12th Standard Chemistry State Board (Tamilnadu) - study material, free online tests, previous year question papers, answer keys, topper answers, centum question paper, exam tips

TN 12th Chemistry p - Block Elements - I 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 27, 2024 - View & Read

TN 12th Chemistry Transition and Inner Transition Elements Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Transition and Inner Transition Elements 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Surface Chemistry Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Surface Chemistry 50 Important 1 Marks Questions With Answers (Book Back and Creative) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Solid State Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Solid State 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry p - Block Elements - II Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry p - Block Elements - II 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry p - Block Elements - I Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry p - Block Elements - I 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Organic Nitrogen Compounds Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Organic Nitrogen Compounds 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Metallurgy Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Ionic Equilibrium Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Hydroxy Compounds and Ethers Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Electro Chemistry Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 24, 2024 - View & Read

TN 12th Chemistry Coordination Chemistry Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Chemistry In Everyday Life Important 2 Marks Questions With Answers (Book Back and Creative) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Chemical Kinetics Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Carbonyl Compounds and Carboxylic Acids Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Biomolecules Important 2 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Metallurgy 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Ionic Equilibrium 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Hydroxy Compounds and Ethers 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Electro Chemistry 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Coordination Chemistry 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Chemistry In Everyday Life 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Chemical Kinetics 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Carbonyl Compounds and Carboxylic Acids 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

TN 12th Chemistry Biomolecules 50 Important 1 Marks Questions With Answers ( Book Back and Creative ) - by Sneha - Jul 23, 2024 - View & Read

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How do concentrations of the reactant influence the rate of reaction?
2)
The rate constant for a first order reaction is 1.54 x 10^-3 s^-1. Calculate its half life time.
3)
The time for half change in a first order decomposition of a substance A is 60 seconds. Calculate the rate constant. How much of A will be left after 180 seconds?
4)
The activation energy of a reaction is 22.5 k Cal mol^-1and the value of rate constant at 40°C is 1.8 x 10^-5s^-1. Calculate the frequency factor, A.
5)
The rate constant of a reaction at 400 and 200K are 0.04 and 0.02 s^-1respectively. Calculate the value of activation energy.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
K_sp of AgCl is \(1.8\times10^{-10}\). Calculate molar solubility in 1 M AgNO₃
2)
Write the expression for the solubility product of Hg₂Cl₂ .
3)
Will a precipitate be formed when 0.150 L of 0.1M Pb(NO₃)₂ and 0.100L of 0.2 M NaCl are mixed? \(K_{sp}\ (PbCl_{2})=1.2\times10^{-5}\).
4)
What is the pH of an aqueous solution obtained by mixing 6 gram of acetic acid and 8.2 gram of sodium acetate and making the volume equal to 500 ml. (Given: K_a for acetic acid is \(1.8\times10^{-5}\))
5)
Establish a relationship between the solubility product and molar solubility for the following
a) BaSO₄
b) Ag₂(CrO₄)

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Solubility product of Ag₂CrO₄ is \(1\times10^{-12}\). What is the solubility of Ag₂CrO₄ in 0.01M AgNO₃ solution?
2)
A saturated solution, prepared by dissolving CaF₂(s) in water, has \([Ca^{2+}]=3.3\times10^{-4}M\). What is the K_sp of CaF₂?
3)
A particular saturated solution of silver chromate Ag₂CrO₄ has \([Ag^{+}]=5\times10^{-5}\) and \([CrO_{4}]^{2-}=4.4\times10^{-4}M\). What is the value of K_sp for Ag₂ CrO₄?
4)
K_sp of Ag₂CrO₄ is \(1.1\times10^{-12}\). What is solubility of Ag₂CrO₄ in 0.1M K₂CrO₄.
5)
K_spof Al(OH)₃ is 1\(\times\)10^-15M. At what pH does 1.0×10^-3M Al³⁺ precipitate on the addition of buffer of NH₄Cl and NH₄OH solution?

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
In fuel cell H₂and O₂ react to produce electricity. In the process, H₂ gas is oxidised at the anode and O₂ at cathode. If 44.8 litre of H₂ at 25⁰C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu²⁺, how many grams of Cu deposited?
2)
A copper electrode is dipped in 0.1M copper sulphate solution at 25^oC. Calculate the electrode potential of copper. [Given: E⁰_Cu²⁺|Cu= 0.34V].
3)
9.2\(\times\)10¹² litres of water is available in a lake. A power reactor using the electrolysis of water in the lake, produces electricity at the rate of 2\(\times\)10⁶Cs⁻¹ at an appropriate voltage. How many years would it take to completely electrolyse the water in the lake. Assume that there is no loss of water except due to electrolysis.
4)
Write a note on sacrificial protection.
5)
Ionic conductance at infinite dilution of Al³⁺ and SO₄^2- are 189 and 160 mho cm² equiv^-1. Calculate the equivalent and molar conductance of the electrolyte Al₂(SO₄)₃ at infinite dilution.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
In fuel cell H₂and O₂ react to produce electricity. In the process, H₂ gas is oxidised at the anode and O₂ at cathode. If 44.8 litre of H₂ at 25⁰C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu²⁺, how many grams of Cu deposited?
2)
A copper electrode is dipped in 0.1M copper sulphate solution at 25^oC. Calculate the electrode potential of copper. [Given: E⁰_Cu²⁺|Cu= 0.34V].
3)
9.2\(\times\)10¹² litres of water is available in a lake. A power reactor using the electrolysis of water in the lake, produces electricity at the rate of 2\(\times\)10⁶Cs⁻¹ at an appropriate voltage. How many years would it take to completely electrolyse the water in the lake. Assume that there is no loss of water except due to electrolysis.
4)
Write a note on sacrificial protection.
5)
Ionic conductance at infinite dilution of Al³⁺ and SO₄^2- are 189 and 160 mho cm² equiv^-1. Calculate the equivalent and molar conductance of the electrolyte Al₂(SO₄)₃ at infinite dilution.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Why does bleeding stop by rubbing moist alum
2)
Comment on the statement: Colloid is not a substance but it is a state of substance.
3)
Write a note on electro osmosis.
4)
Explain intermediate compound formation theory of catalysis with an example.
5)
Describe adsorption theory of catalysis

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What will be the product (X and A) for the following reaction acetylchloride \(\frac{\text { i) } \mathrm{CH}_{3} \mathrm{MgBr}}{\text { ii) } \mathrm{H}_{3} \mathrm{O}^{+}}{\longrightarrow} \mathrm{X} \stackrel{\text { acid } \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}{\longrightarrow}\) A
2)
Predict the product A,B,X and Y in the following sequence of reaction
3)
Phenol is distilled with Zn dust followed by friedel – crafts alkylation with prophyl chloride to give a compound B, B on oxidation gives (c) Indentify A,B and C.
4)
Complete the following reactions
i) CH_3- CH₂ - OH \(\overset { { P}{ Br_3 }{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { aq.NaOH}{ }{ } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { { Na}{ } }{ \underset { {} }{ \longrightarrow } }\) C
ii) C₆H₅- OH \(\overset { { Zn \ dust}{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { CH_3}{Cl}{ } }{ \underset { {Anhydrs}{AlCl_3} }{ \longrightarrow } }\) B \(\overset { { acid}{K MnO_4}{ } }{ \underset { {} }{ \longrightarrow } }\) C
5)
An organic compound (A) molecular formula CH₂O reacts with CH₃MgI to give compound (B). Compound (B) liberates Hydrogen with metallic sodium. Compound (B) in the presence of Con. H₂SO₄ at 410 K on dehydration to give compound (C) molecular formula C₄H₁₀O. Identify (A), (B) and (C). Explain the above reactions.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How will you convert acetylene into n-butyl alcohol.
2)
Complete the following reactions

ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)
3)

Identify A,B,C,D and write the complete equation
4)
0.44g of a monohydric alcohol when added to methyl magnesium iodide in ether liberates at STP 112 cm³ of methane with PCC the same alcohol form a carbonyl compound that answers silver mirror test. Identify the compound.
5)
An organic compound (A) of molecular formula C₆H₆O gives violet colour with neutral FeCI₃. (A) gives maximum of two isomers (B) and (C) when an alkaline solution of (A) is refluxed with CCI₄ (A) also reacts with C₆H₅N₂CI to give the compound (D) which is red orange dye. Identify (A), (B), (C) and (D). Explain with suitable chemical reactions.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
2)
How are the following conversions effected
(a) propanal into butanone
(b) Hex-3-yne into hexan-3-one.
(c) phenylmethanal into benzoic acid
(d) phenylmethanal into benzoin
3)
Complete the following reaction
\({ CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 2 }-\underset { \overset { || }{ O } }{ C } -{ CH }_{ 3 }\overset { HO-{ CH }_{ 2 }-{ CH }_{ 2 }-OH }{ \underset { { dry }{ HCl} }{ \longrightarrow } } ?\)
4)
Identify A, B and C

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How will you convert diethylamine into
i) N, N – diethylacetamide
ii) N – nitrosodiethylamine
2)
Identify A,B and C
\(\overset{SOCl_2}\longrightarrow A \overset{NH_3}\longrightarrow B\overset{LiAlH_4}\longrightarrow (C)\)
3)
Complete the following reaction
4)
Predict A,B,C and D for the following reaction
5)
Identify A to E in the following sequence of reactions

\(\overset { {CH_3} {CL} }{ \underset { {AlCl}_3 }{ \longrightarrow } }\) A \(\overset { {HNO_3}/ {H_2So_4} }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { {Sn} /{HCL} }{ \underset {{} }{ \longrightarrow } }\) (C) \(\overset { {NaNo_2}/ {HCL} }{ \underset { {O^o}C }{ \longrightarrow } }\) D \(\overset { {CuCN} }{ \underset { {}}{ \longrightarrow } }\) E

12th Standard English Medium Chemistry Subject Biomolecules Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Define enzymes
2)
Write the structure of α-D (+) glucophyranose
3)
What are different types of RNA which are found in cell
4)
Write a note on formation of α-helix .
5)
What are the functions of lipids in living organism.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are anti fertility drugs? Give examples.
2)
What are bio degradable polymers? Give examples.
3)
Write a note on vulcanization of rubber
4)
Differentiate thermoplastic and thermosetting.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are narcotic and non – narcotic drugs. Give examples
2)
Write a note on co –polymer
3)
How is terylene prepared?
4)
Classify the following as linear, branched or cross linked polymers
a) Bakelite
b) Nylon-6,6
c) polythene (HDPE)
d) polythene (LDPE)

12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Roasting of sulphide ore gives the gas (A).(A) is a colourless gas. Aqueous solution of (A) is acidic. The gas (A) is______.
2)
The following set of reactions are used in refining Zirconium
\(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
\({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.
3)
In diborane, the number of electrons that accounts for banana bonds is ________.
4)
Which is true regarding nitrogen?
5)
Which of the following does not give oxygen on heating?

12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which of the metal is extracted by Hall-Heroult process?
2)
Which of the following reduction is not thermodynamically feasible?
3)
Duralumin is an alloy of ______.
4)
Which of the following is strongest acid among all?
5)
The catalytic behaviour of transition metals and their compounds is ascribed mainly due to _______.

12th Standard English Medium Chemistry Subject Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is the role of quick lime in the extraction of Iron from its oxide Fe₂O₃?
2)
What is catenation ? describe briefly the catenation property of carbon.
3)
Explain why fluorine always exhibit an oxidation state of -1?
4)
Justify the position of lanthanoids and actinoids in the periodic table.
5)
Write the IUPAC names for the following complexes.

12th Standard English Medium Chemistry Subject Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are the differences between minerals and ores?
2)
Write a note on Fisher tropsch synthesis.
3)
Chalcogens belongs to p-block. Give reason.
4)
Why Gd³⁺ is colourless?
5)
Arrange the following in order of increasing molar conductivity
(i) Mg[Cr(NH₃)(Cl)₅]
(ii) Cr(NH₃)₅Cl]₃[CoF₆]₂
(iii) [Cr(NH₃)₃Cl₃]

12th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain the electrometallurgy of aluminium.
2)
Describe the structure of diborane.
3)
Give a reason to support that sulphuric acid is a dehydrating agent.
4)
Explain the variation in E⁰_{M³⁺/M²⁺} 3d series.
5)
Classify the following ligands based on the number of donor atoms.
a) NH₃
b) en
c) ox^2-
d) pyridine

12th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain the following terms with suitable examples.
(i) Gangue
(ii) slag
2)
AlCl₃behaves like a lewis acid. Substantiate this statement.
3)
How will you prepare chlorine in the laboratory?
4)
Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.
5)
What is linkage isomerism? Explain with an example.

12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain the principle of electrolytic refining with an example.
2)
Write a note on zeolites.
3)
Give two equations to illustrate the chemical behaviour of phosphine.
4)
Which is stronger reducing agent Cr²⁺ or Fe²⁺?
5)
What is crystal field stabilization energy (CFSE)?

12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The selection of reducing agent depends on the thermodynamic factor: Explain with an example.
2)
How will you convert boric acid to boron nitride?
3)
Give a reaction between nitric acid and a basic oxide.
4)
The E⁰_M²⁺/M value for copper is positive. Suggest a possible reason for this.
5)
A solution of [Ni(H₂O)₆]²⁺ is green, whereas a solution of [Ni(CN)₄]^2- is colorless -Explain

12th Standard Chemistry English Medium Metallurgy Important Questions updated Sample Question Papers - by Question Bank Software - May 13, 2022 - View & Read

1)
Which of the metal is extracted by Hall-Heroult process?
2)
Which of the following is not true with respect to Ellingham diagram?
3)
Concentration of copper glance is done by________.
4)
Steel is an alloy of___________
5)
Which of these is not a monomer for a high molecular mass silicone polymer?

12th Standard English Medium Chemistry Subject Metallurgy Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Bauxite has the composition ______.
2)
Which one of the following reaction represents calcinations?
3)
Which of the metal is extracted by Hall-Heroult process?

4)

Match items in column - I with the items of column – II and assign the correct code.

Column-I		Column-II
A.	Cyanide process	(i)	Ultrapure Ge
B	Froth floatation process	(ii)	Dressing of ZnS
C	Electrolytic reduction	(iii)	Extraction of Al
D	Zone refining	(iv)	Extraction of Au
		(v)	Purification of Ni

5)
Which one of the following is not feasible

12th Standard English Medium Chemistry Subject Metallurgy Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which one of the following ores is best concentrated by froth – floatation method?
2)
Zinc is obtained from ZnO by________.
3)
Extraction of gold and silver involves leaching with cyanide ion. silver is later recovered by_______.
4)
The following set of reactions are used in refining Zirconium
\(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
\({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.
5)
The incorrect statement among the following is______.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An aqueous solution of borax is________.
2)
Which among the following is not a borane?
3)
In diborane, the number of electrons that accounts for banana bonds is ________.
4)
Carbon atoms in fullerene with formula C₆₀have _______hybridisation.
5)
The basic structural unit of silicates is _______.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which of the following is not sp² hybridised?
2)
Which of the following statements is not correct?

3)

Column-I		Column-II
A	Borazole	1	B(OH)₃
B	Boric acid	2	B₃N₃H₆
C	Quartz	3	Na₂[B₄O₅(OH)₄]8H₂O
D	Borax	4	SiO₂

4)
Thermodynamically the most stable form of carbon is________.
5)
The stability of +1 oxidation state increases in the sequence ________.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which is true regarding nitrogen?
2)
Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.
3)
On hydrolysis, PCl₃ gives________.
4)
The basicity of pyrophosphorous acid ( H₄P₂O₅) is _______.
5)
Assertion: Bond dissociation energy of fluorine is greater than chlorine gas
Reason: Chlorine has more electronic repulsion than fluorine.
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion.
b) Both assertion and reason are true but reason is not the correct explanation of assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An element belongs to group 15 and 3^rdperiod of the periodic table, its electronic configuration would be_______.
2)
Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.
3)
In the brown ring test, brown colour of the ring is due to _______.
4)
On hydrolysis, PCl₃ gives________.
5)
P₄O₆ reacts with cold water to give _______.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The alloy of copper that contain Zinc is________.
2)
Which of the following does not give oxygen on heating?
3)
In acid medium, potassium permanganate oxidizes oxalic acid to _______.
4)
Which of the following statements is not true?
5)
Permanganate ion changes to ________ in acidic medium.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The number of moles of acidified KMnO₄required to oxidize 1 mole of ferrous oxalate(FeC₂O₄) is _______.
2)
When a brown compound of Mn (A) is treated with HCl, it gives a gas (B). The gas (B) taken in excess reacts with NH₃ to give an explosive compound (C). The compound A, B and C are ________.
3)
Which one of the following statements related to lanthanons is incorrect?
4)
Which of the following lanthanoid ions is diamagnetic?
5)
Which of the following oxidation states is most common among the lanthanoids?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An excess of silver nitrate is added to 100ml of a 0.01M solution of Pentaaquachlorochromium (III)chloride. The number of moles of AgCl precipitated would be _______.
2)
A complex has a molecular formula MSO₄Cl.6H₂O. The aqueous solution of it gives white precipitate with Barium chloride solution and no precipitate is obtained when it is treated with silver nitrate solution. If the secondary valence of the metal is six, which one of the following correctly represents the complex?
3)
Oxidation state of Iron and the charge on the ligand NO in [Fe(H₂O)₅NO]SO₄ are_______.
4)
As per IUPAC guidelines, the name of the complex [Co(en)₂(ONO)Cl]Cl is _______.
5)
IUPAC name of the complex K₃[Al(C₂O₄)₃] is _______.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
A complex in which the oxidation number of the metal is zero is_______.
2)
Formula of tris(ethane-1, 2-diamine)iron(II)phosphate _______.
3)
Which of the following is paramagnetic in nature?
4)
Fac-mer isomerism is shown by _______.
5)
Choose the correct statement.

12th Standard English Medium Chemistry Subject Solid State Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Graphite and diamond are ________.
2)
An ionic compound A_x B_y crystallizes in fcc type crystal structure with B ions at the centre of each face and A ion occupying corners of the cube the correct formula of A_x,B_y is ________.
3)
The ratio of close packed atoms to tetrahedral hole in cubic packing is ________.
4)
Solid CO₂ is an example of ________.
5)
Assertion: monoclinic sulphur is an example of monoclinic crystal system
Reason: for a monoclinic system, \(a\neq b\neq c\) and \(\alpha =\gamma ={ 90 }^{ 0 },\beta \neq { 90 }^{ 0 }\)
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion
b) Both assertion and reason are true but reason is not the correct explanation of assertion.
c) Assertion is true but reason is false.
d) Both assertion and reason are false.

12th Standard English Medium Chemistry Subject Solid State Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
If ‘a’ is the length of the side of the cube, the distance between the body centered atom and one corner atom in the cube will be_________.
2)
Potassium has a bcc structure with nearest neighbor distance 4.52 \(\overset{o}{A}\). Its atomic weight is 39. its density will be_______.
3)
Schottky defect in a crystal is observed when ______.
4)
Assertion: due to Frenkel defect, density of the crystalline solid decreases.
Reason: In Frenkel defect cation and anion leaves the crystal.
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion
b) Both assertion and reason are true but reason is not the correct explanation of assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false
5)
A two dimensional solid pattern formed by two different atoms X and Y is shown below. The black and white squares represent atoms X and Y respectively. The simplest formula for the compound based on the unit cell from the pattern is _______.

Stateboard 12th Standard Chemistry Subject Public Question Paper - March 2022 updated Previous Year Question Papers - by QB Admin - May 13, 2022 - View & Read

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
For a first order reaction A ⟶ B the rate constant is x min⁻¹. If the initial concentration of A is 0.01M, the concentration of A after one hour is given by the expression.
2)
Among the following graphs showing variation of rate constant with temperature (T) for a reaction, the one that exhibits Arrhenius behavior over the entire temperature range is _______.
3)
For the reaction, 2NH₃ ⟶ N₂ + 3H₂, if \(\frac { -d[NH_{ 3 }] }{ dt } \) = k₁[NH₃], \(\frac { d[N_{ 2 }] }{ dt } =k_{ 2 }[NH_{ 3 }],\frac { d[{ H }_{ 2 }] }{ dt } \)= k₃[NH₃] then the relation between k₁, k₂ and k₃ is _________.
4)
For a reaction Rate = k[acetone]^3/2 then unit of rate constant and rate of reaction respectively is _______.
5)
Consider the following statements:
(i) increase in concentration of the reactant increases the rate of a zero order reaction.
(ii) rate constant k is equal to collision frequency A if E_a = 0
(iii) rate constant k is equal to collision frequency A if E_a = ∞
(iv) a plot of ln (k) vs T is a straight line.
(v) a plot of ln (k) vs \(\left( \frac { 1 }{ T } \right) \) is a straight line with a positive slope.
Correct statements are

Stateboard 12th Standard Chemistry Subject Public Question Paper - March 2022 updated Previous Year Question Papers - by QB Admin - May 13, 2022 - View & Read

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
In a homogeneous reaction A⟶B+C+D, the initial pressure was P₀ and after time t it was P expression for rate constant in terms of P₀, P and t will be _____.
2)
If 75% of a first order reaction was completed in 60 minutes, 50% of the same reaction under the same conditions would be completed in_______.
3)
The correct difference between first and second order reactions is that________.
4)
After 2 hours, a radioactive substance becomes \(\left( \frac { 1 }{ 16 } \right) ^{ th }\) of original amount Then the half life (in min) is _______.
5)
This reaction follows first order kinetics. The rate constant at particular temperature is 2.303 x 10^-2 hour^-1. The initial concentration of cyclopropane is 0.25 M. What will be the concentration of cyclopropane after 1806 minutes? (log 2 = 0.3010)

Stateboard 12th Standard Chemistry Subject English Medium Public Answer Key - March 2022 updated Previous Year Question Papers - by QB Admin - May 13, 2022 - View & Read

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The solubility of BaSO₄ in water is 2.42 × 10^-3gL^-1 at 298K. The value of its solubility product(K_sp) will be (Given molar mass of BaSO₄ =233g mol^-1)
2)
pH of a saturated solution of Ca(OH)₂ is 9. The Solubility product (K_sp) of Ca(OH)₂ _______.
3)
Conjugate base for Bronsted acids H₂O and HF are _______.
4)
Which will make basic buffer?
5)
Which of the following fluro compounds is most likely to behave as a Lewis base?

Stateboard 12th Standard Chemistry Subject English Medium Public Answer Key - March 2022 updated Previous Year Question Papers - by QB Admin - May 13, 2022 - View & Read

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
H₂PO₄^- the conjugate base of _______.
2)
Which of the following can act as Lowery – Bronsted acid well as base?
3)
The pH of an aqueous solution is Zero. The solution is _______.
4)
The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by _______.
5)
Which of the following relation is correct for degree of hydrolysis of ammonium acetate?

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)

Electrolyte KCl KNO₃ HCl NaOAC NaCl

Λ_-
(Scm² mol^-1) 149.9 145.0 426.2 91.0 126.5

Calculate Λ^o_HoAC using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25^oC_______.
2)
Faraday constant is defined as_______.
3)
How many faradays of electricity are required for the following reaction to occur MnO₄^-→ Mn²⁺
4)
A current strength of 3.86 A was passed through molten Calcium oxide for 41 minutes and 40 seconds. The mass of Calcium in grams deposited at the cathode is_______. (atomic mass of Ca is 40g / mol and 1F = 96500C).
5)
During electrolysis of molten sodium chloride, the time required to produce 0.1mole of chlorine gas using a current of 3A is _____.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
In the electrochemical cell: Zn|ZnSO₄ _(0.01M)|| CuSO₄ _(1.0M)|Cu, the emf of this Daniel cell is E₁. When the concentration of ZnSO₄ is changed to 1.0M and that CuSO₄ changed to 0.01M, the emf changes to E₂. From the above, which one is the relationship between E₁ and E₂?
2)
Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below:
\({ BrO }_{ 4 }^{ - }\overset { 1.82V }{ \longrightarrow } { BrO }_{ 3 }^{ - }\overset { 1.5V }{ \longrightarrow } HBrO\overset { 1.595v }{ \longrightarrow } { Br }_{ 2 }\overset { 1.0652V }{ \longrightarrow } Br^{ - }\)
Then the species undergoing disproportional is
3)
For the cell reaction
2Fe³⁺(aq) + 2l⁻(aq) \(\rightarrow\)2Fe²⁺ (aq) + 1₂ (aq)
E^o_cell= 0.24V = at 298K. The standard Gibbs energy (Δ, G^o) of the cell reactions is:
4)
A certain current liberated 0.504gm of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution ______.
5)
A gas X at 1 atm is bubbled through a solution containing a mixture of 1MY^-and 1MZ^- at 25^oC. If the reduction potential of Z>Y>X, then_____.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Statement : To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?
2)
Hair cream is _____.
3)
Which one of the following is correctly matched?
4)
The most effective electrolyte for the coagulation of As₂S₃Sol is _______.
5)
Which one of the is not a surfactant?

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which one of the is not a surfactant?
2)
The phenomenon observed when a beam of light is passed through a colloidal solution is_______.
3)
In an electrical field, the particles of a colloidal system move towards cathode. The coagulation of the same sol is studied using K₂SO₄
(i), Na₃ PO₄
(ii), K₄ [Fe(CN)₆]
(iii) and NaCl
(iv) Their coagulating power should be
4)
Collodion is a 4% solution of which one of the following compounds in alcohol – ether mixture?
5)
Which one of the following is an example for homogeneous catalysis?

12th Standard English Medium Chemistry Subject Metallurgy Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Name some common methods of ore concentration.
2)
Name some reducing agents used to convert Metal oxides to metal
3)
Name the various refining process.
4)
Why are sulphide ores converted to oxide form before reduction to metal?
5)
Write the two similarities between calcination and roasting.

12th Standard English Medium Chemistry Subject Metallurgy Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is the role of graphite rods in the electro metallurgy of aluminium?
2)
Name and discuss the principle involved in obtaining silicon of high purity.
3)
Give reason : Extraction of copper directly from sulphide ores is less favourable than from its oxide ores through reduction.
4)
Define metallurgy.
5)
Define roasting.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain the formation of boron trifluoride.
2)
Mention the physical properties of boranes.
3)
What are the uses of boron trifluoride?
4)
What is burnt alum?
5)
What is phosgene? How is it prepared?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are the uses of silicon tetra chloride?
2)
What is inert pair effect?
3)
Name the building block of zeolites. Why zeolites have high porosity?
4)
Name the two important ores of Boron.
5)
Which one is more soluble in diethyl ether, anhydrous Alcl₃ or hydrated Alcl₃? Explain in terms of bonding.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give two uses of nitric acid.
2)
What is the reaction of Phosphorous with alkali?
3)
Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?
4)
(i) Give correct order of boiling point of hydride of group 17.
(ii) Fluorine exhibits only -1 oxidation state whereas other halogens show +1, +3, +5 and +7 oxidation state also Explain.
5)
There is a huge difference between the melting and boiling points of oxygen and sulphur. Why?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How is SO₂ an air pollutant?
2)
Give the reason for bleaching action of Cl₂.
3)
Arrange the following as indicated below:
(i) F₂, Cl₂, Br₂, I₂ - increasing bond dissociation enthalpy.
(ii) HF, HCI, HBr, HI - increasing acidic strength.
4)
Explain Why in spite of nearly the same electronegativity, nitrogen forms hydrogen bonding while chlorine does not - Give reason.
5)
(i) Nitric oxide becomes brown when released in air. Why?
(ii) BiCl₃ is more stable than BiCl₃, Why?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Why Zn²⁺salts are white while Ni²⁺salts are coloured?
2)
Silver atom has completely filled d-orbitals (4d¹⁰) in its ground state. How can you say that it is a transition element?
3)
What happens when KMnO₄ is treated with KI?
4)
Orange colour of Cr₂O₇^2- ion charges to yellow in alkali and yellow solution turns out orange on adding H⁺ ions. Explain why?
5)
Many industrial processes use transition metal or their compounds as catalyst. Why?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is hydroformylation of olefins?
2)
What is Zeigler - Natta catalyst?
3)
What are the conditions for alloy formation?
4)
Draw the structure of permanganate ion.
5)
What is Bayer's reagent?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is the coordination number of central metal ion in [Fe(C₂O₄)₃]^3-?
2)
Write the IUPAC name of the complex.
3)
Define 'Ligand' Give an example of neutral ligand.
4)
Write the IUPAC name of [Ag(NH₃)₂]Cl.
5)
Give the chemical formula of potassium trioxalato ferrate(III}

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Identify the ligand and the central metal in the Co-ordination compound. [Co(NH₃)₄Cl₆]CI
2)
What are Co-ordination isomers? Give examples
3)
What are stereoisomers?
4)
What is facial isomer?
5)
Give the two isomers of Co₂(CO)₈.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The X is _______.
2)
In the reaction sequence, Ethane \(\overset { HOCl }{ \longrightarrow } A\overset { x }{ \longrightarrow } \) ethan -1, 2 - diol. A and X respectively are ________.
3)
Which one of the following is the strongest acid.
4)
on treatment with Con H₂SO₄, predominately gives______.
5)
Carbolic acid is _____.

12th Standard English Medium Chemistry Subject Solid State Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?
2)
Which point effect in crystal doesn't alter the density of the relevant solid?
3)
Define void.
4)
Diamond and solid rhombic sulphur are covalent solids but the latter has very low melting point than the former. Explain why?
5)
Define the term: space lattice.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
HO CH₂ CH₂ – OH on heating with periodic acid gives ______.
2)
Which of the following compound can be used as antifreeze in automobile rediators?
3)
The reactions
is an example of ______.
4)
One mole of an organic compound (A) with the formula C₃H₈O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is ______.
5)
Among the following ethers which one will produce methyl alcohol on treatment with hot HI?

12th Standard English Medium Chemistry Subject Solid State Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Name the seven primitive crystal systems.
2)
In CaF₂ crystal, Ca²⁺ ions are present in arrangement. Calculate the number of F^- ions in the unit cell.
3)
Distinguish between cubic and hexagonal unit cells.
4)
What is F centre?
5)
A compound forms hexagonal dosed packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The correct structure of the product ‘A’ formed in the reaction ______.
2)
Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _______.
3)
In the following reaction, \(HC\equiv CH \overset { { H }_{ 2 }{ SO }_{ 4 } }{ \underset { HgS{ O }_{ 4 } }{ \longrightarrow } } X\) Product ‘X’ will not give _______.
4)
\({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.
5)
Predict the product Z in the following series of reactions Ethanoic acid \(\overset { { PCI }_{ 5 } }{ \longrightarrow } X\overset { { C }_{ 6 }{ H }_{ 6 } }{ \underset { Anhydrous \ AlCI }-_{3}{ \longrightarrow } } Y\overset { 1){ CH }_{ 3 }MgBr }{ \underset { II){ H }_{ 3 }{ O }^{ + } }{ \longrightarrow } } Z.\)

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How does the value of rate constant vary with reactant constant.
2)
Answer the following:
(i) Effect the adding catalyst on activation energy and Gibb's energy (ΔG).
(ii) Why do we heat the solution of oxalic acid in redox titration against KMnO₄?
3)
A first order reaction has a specific reaction rate of 10^-3 S^-1. How much time will it take for 10gm of the reactant to reduce to 2.5 gm?
4)
In a reaction, 2A \(\longrightarrow \) products, the concentration of A decreases from 0.5 mol L^-1to 0.4 mol L^-1 in 10 minutes. Calculate the rate during this interval?
5)
Explain how will you find activation energy of a reaction by graphical method.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ________.
2)
In which of the following reactions new carbon – carbon bond is not formed?
3)
An alkene “A” on reaction with O₃ and Zn - H₂O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is ______.
4)
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ________.
5)
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The decomposition reaction of ammonia gas on platinum surface has a rate constant R = 2.5 x 10^-4mol L^-1. What is the order of the reaction.
2)
For the reaction Cl_{2 (g)} + 2NO _(g)⟶ 2NOCI_(g)
The rate law is expressed as rate = K[Cl₂] [NO]²
What is the overall order of this reaction?
3)
Write the units of zeroth, first, second and third order rate constants.
4)
If the rate of a reaction gets doubled as the temperature is increased from 27^oC to 37^oC. Find the activation energy of reaction?
5)
Mention the factors that affected the rate of a chemical reaction.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which one of the following will not undergo Hofmann bromamide reaction.
2)
Assertion: Acetamide on reaction with KOH and bromine gives acetic acid
Reason: Bromine catalyses hydrolysis of acetamide.
Codes:
a) if both assertion and reason are true and reason is the correct explanation of assertion.
b) if both assertion and reason are true but reason is not the correct explanation of assertion.
c) assertion is true but reason is false
d) both assertion and reason are false.
3)
CH₃CH₂ Br \(\overset { aqNaOH }{ \underset { \Delta }{ \longrightarrow } } A\overset { { KMnO }_{ 4 }{ /H }^{ + } }{ \underset { \Delta }{ \longrightarrow } } B\overset { { NH }_{ 3 } }{ \underset { \Delta }{ \longrightarrow } } C\overset { { Br }_{ 2 }/NaOH }{ \longrightarrow } D\) D' is________.
4)
Which one of the following nitro compounds does not react with nitrous acid.
5)
Aniline + benzoylchloride \(\overset { NaOH }{ \longrightarrow } \)C₆H₅ - NH - COC₆ H₅ this reaction is known as ______.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Define neutralisation reaction.
2)
When temperature is increased, will ionic product of water increase or decrease? Give reason to justify your answer.
3)
The K_W of a neutral solution is 10^-12 at a particular temperature. What are its pH and pOH values?
4)
How is common ion effect related to the solubility of the electrolyte?
5)
What are the limitations of Ostwald's dilution law?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
_______.
2)
IUPAC name for the amine
3)
P Product ‘P’ in the above reaction is _______.
4)
Identify X in the sequence give below
5)
Among the following, the reaction that proceeds through an electrophilic substitution is : _______.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give a condition for a compound to be precipitated.
2)
Magnesium is not precipitated from a solution of its salt by a mixture of NH₄OH and NH₄Cl. Explain
3)
BF₃ is termed as an acid though it does not contain H⁺ ions. Explain.
4)
Calculate the ionisation constant for the conjugate base of HF. Ionisation constant of HF at 298 K is 6.8 x 10^-4
5)
Why is aqueous solution of FeCl₃ acidic?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The correct corresponding order of names of four aldoses with configuration given below Respectively is ______.
2)
\(\text { Glucose } \stackrel{(\mathrm{HCN})}{\longrightarrow} \text { Product } \stackrel{(\text { hydrolysis })}{\longrightarrow} \text { Product } \stackrel{(\mathrm{HI}+\text { Heat })}{\longrightarrow} \mathrm{A}\) , the compound A is______.
3)
The central dogma of molecular genetics states that the genetic information flows from______.
4)
Among the following the achiral amino acid is ______.
5)
In aqueous solution of amino acids mostly exists in ______.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give examples of primary cells.
2)
Name the anode, cathode and electrolyte used in lithium - ion Battery
3)
What is known as intercalation?
4)
Write a note on galvanising
5)
What is corrosion?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which of the following vitamins is water soluble?
2)
Which of the following statement is correct?
3)
If one strand of the DNA has the sequence ‘ATGCTTGA’, then the sequence of complementary strand would be ______.
4)
α -D (+) Glucose and β-D (+) glucose are ______.
5)
Which of the following amino acids are achiral?

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give an example of secondary cell.
2)
Write the oxidation, reduction and overall redox reaction taking place in the Lithium ion battery.
3)
What is a fuel cell?
4)
Explain how iron is protected from corrosion by coating with magnesium.
5)
What is passivation?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 1 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statement is not true.
2)
Saccharin, an artificial sweetener is manufactured from ____________.
3)
Drugs that bind to the receptor site and inhibit its natural function are called _______.
4)
Aspirin is a/an _______.
5)
Which is the monomer of neoprene in the following?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is ultrasonic dispersion?
2)
Why are colloids purified?
3)
Give the methods of purification of colloids.
4)
What is Ultrafilteration?
5)
What is Helmholtz double layer?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 1 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An example of anti-fertility drug is ____________.
2)
The drug used to induce sleep is _______________.
3)
Which of the following is a co-polymer?
4)
The polymer used in making blankets (artificial wool) is _______.
5)
Regarding cross-linked or network polymers, which of the following statement is incorrect?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is peptisation? Give an example.
2)
Explain the formation of delta.
3)
Why is a colloidal sol stable?
4)
Which will adsorb more gas, a lump of charcoal or its powder and why?
5)
Name the types of emulsions.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What happens when anisole is nitrated?
2)
Give a test to identify whether a given -OH group is alcoholic or phenolic in nature.
3)
What happens when crotonaldehyde is reduced in the presence of LiAlH₄?
4)
State Saytzeff's rule.
5)
Preparation of ethers by intermolecular dehydration of alcohols in the presence of an add is not a suitable method for mixed ethers. Give reason.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How will you convert C₂H₅OH to C₂H₅OC₂H₅?
2)
Explain 'esterification' reaction with an example.
3)
What happens when ethylene reacts with alkaline KMnO₄ solution?
4)
Explain why phenol does not undergo substitution of the -OH group like alcohol.
5)
Give chemical test to distinguish between methanol and phenol.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is DIBAL -H? What is it used for?
2)
Write a note on Etard reaction?
3)
Write the structural formula of 1,1 - dimethoxy ethane. How is it prepared from ethanal?
4)
Acetone is soluble in water but benzophenone is not. Give reason.
5)
Write the structures of A and B in the following reaction. Name the reaction involved.
\({ CH }_{ 3 }COCl\overset { pd/Ba{ SO }_{ 4 } }{ \underset { { H }_{ 2 } }{ \longrightarrow } } A\overset { { NH }_{ 2 }OH }{ \longrightarrow } B\)

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Name one reagent used to distinguish acetaldehyde and acetone.
2)
Does formaldehyde undergo aldol condensation? Justify your answer.
3)
What is urotropine? Give its use.
4)
What is formalin? Write its use.
5)
Write a note on haloform reaction.

12th Standard English Medium Chemistry Subject Metallurgy Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which of the following is not a mineral of aluminium?
2)
Among the following, one does not belong to calcination, Pick the odd one out.
3)
Name the process by which elements such as germanium, silicon and gallium are refined.
4)
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with________.
5)
Which one of the following element is present as a impurity in pig iron?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What happens when acetonitrile is hydrolysed?
2)
How will you distinguish between ethylamine and diethylamine?
3)
What happens when aniline is treated with bromine?
4)
Explain why aniline is less basic than methylamine?
5)
Explain why amines are more basic than amides.

12th Standard English Medium Chemistry Subject Metallurgy Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The percentage of carbon in high carbon steel is_________.
2)
Steel is an alloy of___________
3)
Sodium cyanide solution is used to extract _________from its ores
4)
Galena is_______.
5)
In Hall-Heroult process ___________act as an anode.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Convertmethylisocyanide ⟶ dimethylamine
2)
What is 'spirit of nitre'? Give its use.
3)
Write the uses of nitro alkanes.
4)
Give any two uses of nitrobenzene.
5)
In the given set of reactions, 2 bromopropane \(\xrightarrow [ \triangle ]{ Alc.AgCN } \ 'X'\underrightarrow { { LiAlH }_{ 4 } } 'Y'\). Identify the product Y and give its IUPAC name.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The stability of +1 oxidation state among Al, Ga, In and Tl increases in sequence _______.
2)
Chemical formula of phosgene is_______.
3)
SiO₄^4- ion has ____ geometry.
4)
Which of the following oxide is amphoteric?
5)
Which of the following statements about H₃BO₃ is not correct?

12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Define nucleotide.
2)
The two strands in DNA are not identical but are complementary explain.
3)
Write a note on rRNA.
4)
Name the important biological functions of nucleic acids.
5)
What do you mean by zwitter ion?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Elements of group 13 mainly form covalent compounds because ______
2)
All elements except carbon have the tendency to show maximum covalency of six ______
3)
Group 14 elements have general electronic configuration _______.
4)
The silicates which contain discrete tetrahedral units are _______.
5)
Borax is _______.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Catenation property of group 15 elements, follow the order _______.
2)
Which is dibasic?
3)
Allotrope of sulphur which shows paramagnetic behaviour _______.
4)
Pick the wrong one among the following
5)
When Copper is heated with cone HNO₃ it produces

12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Name the two constituent of starch.
2)
What is renaturation?
3)
What do you mean by transcription?
4)
Give an example of an amino acid containing sulphur. Write its zwitter ion form.
5)
The sucrose that we eat in daily life is converted into glucose and fructose. Name the enzyme which facilitates this chemical reaction.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The incorrect statement regarding structure of ozone is______.
2)
Strong reducing behaviour of H₃PO₂ is due to______.
3)
Which reaction is not feasible.
4)
The ionisation energy of Ga is higher than that of Al because of_________
5)
The high reactivity of fluorine is due to________.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The highest possible oxidation state shown by osmium in its compound is_______.
2)
The trend in ionisation enthalpy of a transition element is not regular because,_______.
3)
Which one of the following exhibits highest oxidation state?
4)
Which of the following is coloured due to charge transfer?
5)
What are the species X and Y in the following?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write a note on Orion?
2)
Give an example of bacteriocidal antobiotic.
3)
Name two narcotic which are used as analgesics.
4)
Saccharin is 550 times sweeter than sugar, yet used to prepare sweets for diabetic patient - Give reason.
5)
Why Iodoform and phenolic solutions are called antiseptic?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
________ has the highest electrical conductivity at room temperature.
2)
If the standard electrode potential (E^o) of a metal is ________ and __________ the metal is a powerful reducing agent.
3)
Equivalent weight of KMnO₄ in acidic medium is _______.
4)
The common oxidation state of lanthanoids is ________.
5)
_________ is known as Bayer's reagent.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Primary and secondary valencies of Cu in [Cu(NH₃)₄]SO₄ is _______.
2)
Which of the following octahedral complexes do not show geometrical isomerism?
3)
The spin only magnetic moment of [Mnfsr₄]^2- is 5.9 BM. Geometry of the complex ion is _______.
4)
According to CFT, five d-orbitals of an octahedral complex split to give _______.
5)
Which of the following is correct statement?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
_______ valencies are directional in nature.
2)
The number of trans positions in a octahedral complex is _________.
3)
The chemical formula for diammine silver (I) chloride is _______.
4)
Magnetic moment is given by the formula _______.
5)
The oxidation state of the central metal ion in the complex [Co(H₂O)(CN)(en)₂]²⁺ is________.

12th Standard English Medium Chemistry Subject Solid State Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?
2)
What is wrong about a.b.c.c. unit cell?
3)
Which one of the following does not belong to AB type?
4)
The smallest repeating unit in space lattice which when repeated over and again results in the crystal of the given substance is called_______.
5)
The number of close neighbours in a body centred cubic lattice of identifical spheres is _______.

12th Standard English Medium Chemistry Subject Solid State Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
If electrical conductivity is found to be same in all directions through a solid the substance is ________ solid and the property is called _________.
2)
Coordination number of tetrahedral and octahedral voids respectively are________.
3)
Crystals of NaCI has yellow colour due the presence of_________.
4)
Structure of B₂O₃ is _____.
5)
The correct order of packing efficiency in different types of unit cells is________.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write a note on General anaesthetics?
2)
What are Antacids? Give three examples of antacid.
3)
What are food additives?
4)
What are sugar substituents? Give two examples.
5)
Define TFM.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The Unit of rate constant and rate of reaction are same for ______.
2)
Which of the following statement is not correct?
3)
For an exothermic chemical process occurring in 2 steps as
(i) A +B ⟶ X (slow) ;
(ii) X ⟶ AB (fast)
The progress of the reaction can be best described by (x- intermediate).
4)
Nitric oxide (NO) reacts with oxygen to produce nitrogen dioxide
2NO_(g) + O_2(g) ⟶ 2NO_2(g)
If the mechanism of reaction is ______.
NO + O₂ \(\overset { K }{ \rightleftharpoons } \) NO₃ (fast)
NO₃ + NO \(\overset { { K }_{ 1 } }{ \rightleftharpoons } \) NO₂ + NO₂ (slow)
5)
A reaction having equal activation energies for forward and reverse reactions has ______.

12th Standard English Medium Chemistry Subject Metallurgy Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is coupling of reaction? How is it useful in metallurgy?
2)
How oxides of metals are reduced by hydrogen?
3)
What is auto-reduction?
4)
Mention the uses of copper.
5)
What is Misawite? Give its composition.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
CH₃COOCH₃ + H₂O \(\overset { { H }^{ + } }{ \longrightarrow } \) CH₃COOH + CH₃OH is an example of _______ order reaction.
2)
For a general reaction aA + bB ⟶Products, the rate of the reaction is equal to______.
3)
In a second order reaction, if one of the concentration is excess, the order of the reaction is ________ order reaction.
4)
If [A] is the concentration of A at any time t and [A_o] is the concentration at t = 0, then for the first order reaction, the rate equation can be written as ______.
5)
Activation energy of a reactant is reduced by ________.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are the differences between minerals and ores?
2)
What is the role of quick lime in the extraction of Iron from its oxide Fe₂O₃?
3)
Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.
4)
Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?
5)
Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Pick out the incorrect statement regarding Lewis acids and bases
2)
With regard to the strength of acids and bases, Find the incorrect statement among the following.
3)
HCl is a strong acid since _______.
4)
Ionic product of water increases when _______.
5)
An aqueous solution with pH value zero is _______.

12th Standard English Medium Chemistry Subject Metallurgy Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is cyanide leaching? Give an example
2)
What is meant by ammonia leaching?
3)
How is acid leaching done for the sulphide ores?
4)
Explain roasting with an example.
5)
What is vapour phase method?

12th Standard English Medium Chemistry Subject Metallurgy Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are the differences between minerals and ores?
2)
What are the various steps involved in the extraction of pure metals from their ores?
3)
Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.
4)
Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?
5)
Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
\({ X }_{ m }{ Y }_{ n(s) }\overset { { H }_{ 2 }O }{ \rightleftharpoons } { mX }_{ (aq) }^{ n+ }+{ nY }_{ (aq) }^{ m- }\)
2)
Which among the following is incorrect regarding acids?
3)
When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid _______.
4)
Which one of the following formula represents Ostwald's dilution law for a binary whose degree of dissociation is a and concentration C.
5)
Which one of the following relationship is correct?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How is aluminium chloride prepared by McAfee process?
2)
Describe the structure of graphite.
3)
Describe the structure of fullerenes.
4)
Describe the structure of graphene.
5)
How is CO₂ manufactured?

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write a short note on anomalous properties of the first element of p-block.
2)
Describe briefly allotropism in p- block elements with specific reference to carbon.
3)
Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF₃.
4)
Write a note on Fisher tropsch synthesis.
5)
Give the structure of CO and CO₂.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid ______.
2)
NH₄OH is a weak base because ______.
3)
An example for 1 : 1 electrolyte is ______.
4)
According to Faraday's first law m = ZIt, where Z is ______.
5)
1 mho is equal to ______.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give the uses of boric acid?
2)
How is boron trifluoride obtained from boron trioxide?
3)
How is aluminum chloride prepared from aluminum?
4)
Give 3 uses of aluminium chloride
5)
Describe the structure of diamond.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Describe briefly allotropism in p- block elements with specific reference to carbon.
2)
Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF₃.
3)
Give the uses of Borax
4)
What is catenation ? describe briefly the catenation property of carbon.
5)
Write a note on Fisher tropsch synthesis.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The electrode where there is gain of electrons is called ______.
2)
The zinc - copper cell has emf of _______.
3)
For gases, the standard emf depends on _______.
4)
SHE is _______.
5)
The feasibility of a redox reaction can be predicted with the help of ________.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain the characteristic properties of hydrogen halides.
2)
Write the order of thermal stability of the hydrides of group 16 elements.
3)
Explain why the stability of oxoacids of chlorine increases in the order given below?
HCIO < HCIO₂ < HCIO₃ < HCIO₄
4)
CIF₃ molecule has aT-shaped structure and not a trigonal planar one. Why?
5)
Predict the product
(i) PCI₅+ C₂H₅OH \(\longrightarrow \)?
(ii) P₄+ SO₂Cl₂\(\longrightarrow \) ?
(iii) POCl₃ + H₂O \(\longrightarrow \) ?
(iv) HBr + PH₃\(\longrightarrow \) ? :,
(v) PCl₃+ H₂O\(\longrightarrow \) ?

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give the oxidation state of halogen in the following.
a) OF₂
b) O₂F₂
c) Cl₂O₃
d) I₂O₄
2)
Why fluorine is more reactive than other halogens?
3)
Give the uses of helium.
4)
What is the hybridisation of iodine in IF₇? Give its structure.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The phenomenon of Tyndall's effect is not observed in _______.
2)
Colloidal medicines are more efffective because _______.
3)
Oil soluble dye is mixed with emulsion and emulsion remains colourless then, the emulsion is _______.
4)
For chemisorption, which is wrong?
5)
Colloids are purified by _______.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain the reaction of ammonia with chlorine and chlorides at different conditions.
2)
Explain the commercial method of preparation of nitric acid.
3)
Give a test for sulphate?
4)
An element A occupies group number 17 and period number 2 is the most electronegative element. Element A reacts with another element B) which occupies group number 17 and period number 4 to give a compound Compound C undergoes sp³d² hybridisation and has octahedral structure. Identify the elements a and B and the compound C. Write the reactions.
5)
Discuss the anomalous nature of fluorine.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is inert pair effect?
2)
Chalcogens belongs to p-block. Give reason.
3)
Explain why fluorine always exhibit an oxidation state of -1?
4)
What are interhalogen compounds? Give examples.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Decomposition of hydrogen peroxide is retarded in the presence of________.
2)
The emulsifying agent used in O/W type is _______.
3)
Emulsifying agent is used for________.
4)
The colloid used for stomach disorder is_______.
5)
Argyrol is_______.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write the properties of interstitial compound.
2)
What is chromyl chloride test? Give equations.
3)
Explain the preparation of potassium permanganate from pyrolusite.
4)
Give the ionic reaction of electrolytic of aqueous solution of KMnO₄
5)
Explain the oxidising property of KMnO₄ in natural medium. Give the equations.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are transition metals? Give four examples.
2)
Explain the oxidation states of 4d series elements.
3)
Describe the preparation of potassium dichromate.
4)
What is lanthanoid contraction and what are the effects of lanthanoid contraction?
5)
Complete the following.
a. 3MnO₄^2- + 4H⁺ ⟶?
b. C₆H₅CH₃ \(\overset { acidified }{ \underset { KMnO_{ 4 } }{ \longrightarrow } } \)?
c. MnO₄^- + Fe²⁺ ⟶?
d. KMnO₄ \(\overset { \triangle }{ \underset { Red\ hot }{ \longrightarrow } } \) ?
e. Cr₂O₇^2- + 6I^- + 14H⁺ ⟶?
f. Na₂Cr₂O₇ + 2KCl ⟶?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which of the following has an offensive odour?
2)
Which of the following is not correct? Glycerol is used as ______.
3)
Which one of the following is optically active?
4)
The compound that does not undergo Cannizaro reaction is ______.
5)
Which one of the following is simple ether?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are the uses of potassium dichromate?
2)
What happens to potassium permanganate on chemical oxidation?
3)
Explain the oxidising property of KMnO₄ in alkaline medium.
4)
What are the causes of lanthanoids contraction?
5)
Which is the last element in the series of the actinoids? Write the electronic configuration of this element comment on the possible oxidation state of this element.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are inner transition elements?
2)
Justify the position of lanthanoids and actinoids in the periodic table.
3)
What are actinides? Give three examples.
4)
Why Gd³⁺ is colourless?
5)
Explain why compounds of Cu²⁺ are coloured but those of Zn²+ are colourless.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The number of possible isomers for molecular formula C₄H₁₀O is _________.
2)
The number of alcohol isomers for molecular formula C₄H₁₀O is ________.
3)
CH₃-CH₂-O-CH₂CH₃ and \({ CH }_{ 3 }-O-\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 3 }\) are examples of _______ isomerism.
4)
_______ cannot be prepared by using Grignard reagent.
5)
On heating, peroxides are ________.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain optical isomerism.
2)
Explain Bonding is metal carbonyls.
3)
What is stability constant?
4)
Name some metal complexes, that are present in our biological system and their role in it.
5)
Mohr's salt answers the presence of Fe²⁺, NH⁴⁺and SO₄^2- ions, whereas the potassium ferrithiocyanate will not answer Fe³⁺ and SCN ions give reason.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write the IUPAC names for the following complexes.
2)
Write the formula for the co-ordination compounds.
3)
Arrange the following in order of increasing molar conductivity
(i) Mg[Cr(NH₃)(Cl)₅]
(ii) Cr(NH₃)₅Cl]₃[CoF₆]₂
(iii) [Cr(NH₃)₃Cl₃]
4)
Draw all possible geometrical isomers of the complex [Co(en)₂Cl₂]⁺ and identify the optically active isomer.
5)
[Ti(H₂O)₆]³⁺ is coloured, while [Sc(H₂O)₆]³⁺ is colourless- explain.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Cannizaro reaction is not given by _______.
2)
The IUPAC name of the compound
3)
Identify 'X'.
4)

Choose a suitable reagent to carry out the above reaction.
5)
A compound 'X' when mixed with ethanol and a drop of concentrated H₂SO₄ gave a compound with fruity odour. Identify 'X'.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The rate constant k for the first order gas phase decomposition of ethyl iodide, C₂H₅I ⟶ C₂H₄ + HI is 1.60 x 10^-5 s^-1 at 600k and 6.36 x 10^-3 s^-1 at 700K. Calculate the energy of activation for this reaction.
2)
From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.
(i) 3NO_(g)⟶ N₂O_(g) Rate = K[NO]²
(ii) H₂O₂_(aq) + 3I^-_(aq) +2H⁺ ⟶ 2H₂O_(l) +I₃^- Rate = K[H₂O₂][I^-]
(iii) CH₃CHO_(g) ⟶ CH₄_(g) + CO_(g) Rate = K[CH₃ CHO]^3/2
(iv) C₂H₅Cl_(g) ⟶ C₂H_2(g) + HCl_(g) Rate = K[C₂H₅Cl]²
3)
A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is
(i) doubled (ii) reduced to half
4)
A reaction is first order in A and second order in B.
(i) Write the differential rate equation.
(ii) How is rate affected on increasing the concentration of B three times?
(iii) How is the rate affected when the concentrations of both A and B are doubled?
5)
The rate constant for a first order reaction is 60 S^-1. How much time will it take to reduce the initial concentration of the reactant to its \({ \frac { 1 }{ 16 } }^{ th }\) value?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Ni²⁺ is identified using alcoholic solution of dimethyl glyoxime. Write the structural formula for the rosy red precipitate of a complex formed in the reaction.
2)
[CuCl₄]^2- exists while [Cul₄]^2- does not exist why?
3)
Calculate the ratio of \(\frac { \left[ { Ag }^{ + } \right] }{ \left[ Ag\left( NH_{ 3 } \right) _{ 2 } \right] ^{ + } } \) in 0.2 M solution of NH_3. If the stability constant for the complex \([Ag(NH_{ 3 })_{ 2 }]^{ + }\) is 1.7 x 10⁷
4)
Give an example of coordination compound used in medicine and two examples of biologically important coordination compounds.
5)
Based on VB theory explain why [Cr(NH₃)₆]³⁺ is paramagnetic, while [Ni(CN)₄]^2- is diamagnetic.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
With respect to the reagents given below, pick out the odd one _________.
2)
Formic acid contains _______ groups
3)
acid chloride + alcohol \(\longrightarrow\)?.
4)
CH₃CHO and C₆H₅CH₂CHO can be distinguished by ______.
5)
\(Phenol\overset { Zn }{ \underset { dust }{ \longrightarrow } } 'X'\overset { { CH }_{ 3 }Cl }{ \underset { anhy\ AlC{ I }_{ 3 } }{ \longrightarrow } } Y\overset { alk }{ \underset { { KMnO }_{ 4 } }{ \longrightarrow Z } } \) the product Z is __________.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What do you mean by auto ionisation of water?
2)
Define buffer Index
3)
How will you calculate solubility product from molar solubility?
4)
What is Henderson equation?
5)
What do you mean by buffer action?

12th Standard English Medium Chemistry Subject Solid State Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain briefly seven types of unit cell.
2)
Distinguish between hexagonal close packing and cubic close packing.
3)
Distinguish tetrahedral and octahedral voids.
4)
What are point defects?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
C₆H₅NH₂\(\underrightarrow { { NANO }_{ 2 }/HCl } \) X Identify X.
2)
Aniline differs from ethylamine by the reaction with
3)
Which among the following dissolves in NaOH?
4)
When nitro methane condenses with acetone it gives
5)
Which gives an yellow oil with nitrous acid?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Draw the structures of geometrical isomers of [Fe(NH₃)₂ (CN)₄]^-
2)
What are the limitations of VBT?
3)
What is \(\pi \) back bonding?
4)
What is the significance of stability constants?
5)
Draw and explain the structure of Cisplatin.

12th Standard English Medium Chemistry Subject Solid State Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain briefly seven types of unit cell.
2)
Distinguish between hexagonal close packing and cubic close packing.
3)
Distinguish tetrahedral and octahedral voids.
4)
What are point defects?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The compound that does not show tautomerism is ____________
2)
CCl₃ NO₂ is used as ________
3)
Use of chloropicrin is as ____________
4)
Oxidation of aniline with acidified K₂Cr₂O₇ gives ___________
5)
The intermediate formed in the nitration of benzene is _________

12th Standard English Medium Chemistry Subject Solid State Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write a note on the assignment of atoms per unit cell in fcc.
2)
State Bragg's law.
3)
Write the properties of ionic crystals.
4)
Answer the following:
(I) Name the intermolecular force present in ice.
(II) What type of bond is present in network solid?
5)
Distinguish the following. Crystal lattice and unit cell.

12th Standard English Medium Chemistry Subject Biomolecules Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which is a monosaccharide among the following?
2)
Sucrose is not
3)
Glucose is not oxidised to gluconic acid by
4)
The amino acid without chiral carbon is
5)
Which is not true of amino acid?

12th Standard English Medium Chemistry Subject Solid State Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Silver crystallizes in fcc lattice. If edge length of the cell is 4.07 x 10^-8 em and density is 10.5 g cm^-3. Calculate the atomic mass of silver
2)
Why are solids incompressible?
3)
What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3^rdof tetrahedral voids?
4)
Inspite of long range order in the arrangement of particles, why are the crystals usually not perfect?
5)
ZnO turns yellow on heating. Why?

12th Standard English Medium Chemistry Subject Biomolecules Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The sugar unit present in nucleic acid is___________
2)
Penta hydroxy hexanone is__________
3)
In acidic solution an amino acid, when placed in an electric field__________
4)
The precipitation of protein is called_________
5)
Hydrolysis of cellulose yields_______

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The activation energy of the reaction 2HI_(g) ⟶ H_2(g) +I_2(g)is 209.5 KJ mol^-1 at 581 K. Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy.
2)
The decomposition of NH₃ on platinum surface is zero order reaction what are the rates of production of N₂and H₂ if k = 2.5 x10^-4mol + L S^-1.
3)
What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?
4)
Calculate the half-life of a first order reaction from their rate constants given below.
(i) 200 S^-1
(ii) 2 min^-1
(iii) 4 years^-1
5)
Write the differences between rate and rate constant of a reaction.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Define average rate and instantaneous rate.
2)
Define rate law and rate constant.
3)
Derive integrated rate law for a zero order reaction A\(\longrightarrow \) product.
4)
What is the order with respect to each of the reactant and overall order of the following reactions?
a) 5Br^-_(aq)+BrO₃^-_(aq)+6H⁺_(aq) ➝3Br_2(l)+3H₂O_(l)
The experimental rate law is Rate = k [Br⁻][BrO₃⁻][H⁺]²
b) CH₃CHO_(g)\(\overset { \Delta }{ \longrightarrow } \) CH_4(g)+CO_(g) the experimental rate law is
Rate =K[CH₃CHO]^{\(\frac{3}{2}\)}
5)
The rate of the reaction X + 2y→ product is 4 x 10^-3 mol L^-1S^-1, if [X] = [Y] = 0.2M and rate constant at 400K is 2 x 10^-2s^-1, What is the overall order of the reaction.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Sulphur dioxide act as _________
2)
The monomer of PVC is _______
3)
Which of the following is not a non - narcotic analgesic?
4)
Zeiglar Natta catalyst is _________
5)
Addition polymerisation is also called as _______ polymerisation.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Why does the emf of Leclanche cell decrease?
2)
Explain the reactions taking place in the anode and cathode of a lead storage battery.
3)
Corrosion of aluminum takes place at a much slower rate than iron. Give reason
4)
State Ohms law.
5)
The standard reduction potential of Fe³⁺, Fe²⁺/ Pt is +0.771 V. This half cell is connected with another half cell such that emf of the cell is 0.771V. What is the other half cell?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Zeiglar Natta catalyst is _________
2)
Addition polymerisation is also called as _______ polymerisation.
3)
The polymer obtained by the condensation of phenol with formaldehyde is ________
4)
The specific treatment of a disease using medicine is known as ________
5)
Proteins which act as biological catalysts are called ________

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The standard reduction potential of Fe³⁺, Fe²⁺/ Pt is +0.771 V. This half cell is connected with another half cell such that emf of the cell is 0.771V. What is the other half cell?
2)
Write the overall redox reaction for the zinc-copper cell. Show the oxidation and reduction half reaction.
3)
Show that SHE can act both as a anode as well as cathode.
4)
Derive the relation between EMF and free energy.
5)
Draw a neat diagram of Leclanche cell and mark the parts.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write a note on auto catalysis?
2)
What are the important concepts of catalysis that adsorption theory explains?
3)
Give an example for a reaction catalysed by nano particles
4)
How are colloidal solution of ink and graphite prepared?
5)
What are the advantages of Brownian movement?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Define Gold number.
2)
Name various techniques by which a colloid can be deemulsified.
3)
Name two industrial process where heterogeneous catalysts are used.
4)
Define adsorption.
5)
For the coagulation of 100 ml of arsenious sulphide sol, 5 ml of 1 M NaCI is required. What is the flocculation value of NaCl?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Why is that tertiary alcohols show greater reactivity towards hydrogen halides than secondary and primary alcohols?
2)
How is glycerol obtained commercially? State its uses.
3)
Give a brief account of the following reaction: Etherification.
4)
Identify the isomerism in each of the following pairs.
CH₃OCH₂OCH₃ and CH₃OCH₂CH₂OH
CH₃CH(OH)CH₂OH and CH₂OHCH₂CH₂OH
\({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-OH\) and CH₃-CH₂-CH₂-CH₂OH
5)
Give the IUPAC names of each of the following and classify them as 1°, 2° and 3°
(a) CH₃(CH₂)₃CHOHCH(CH₃)₂
(b) (CH₃)₃C-CH₂OH
(c) \(({ CH }_{ 3 })_{ 2 }\underset { \overset { | }{ { C }_{ 6 }{ H }_{ 5 } } }{ C } -OH\)
(d) \(BrCH_{ 2 }-\underset { \overset { | }{ OH } }{ { CH }_{ 2 } } -CH-C({ CH }_{ 3 })_{ 3 }\)
(e) CH₂=CH-CHOHCH
(f) PhCH₂OH
(g) HOCH₂CH₂CH₂CH₂C₆H₅
(h) (C₂H₅)₃COH

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How will you prepare phenol (i) From chloro benzene (ii) From benzene sulphonic acid?
2)
How is nitroglycerine prepared from glycerol?
3)
How do ethers react with HI? Give the significances of the reaction.
4)
Account for the following:
(I) Phenol does not get protonated readily.
(ii) Phenol, benzene diazonium chloride, NaOH solution gives red dye.
5)
Halo alkane are easily prepared from alcohols while alkyl halides cannot be prepared from phenol. Justify.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Define half life of a reaction. Show that for a first order reaction half life is independent of initial concentration.
2)
What is an elementary reaction? Give the differences between order and molecularity of a reaction.
3)
Explain the rate determining step with an example.
4)
Describe the graphical representation of first order reaction.
5)
Write the rate law for the following reactions.
(a) A reaction that is 3/2 order in x and zero order in y.
(b) A reaction that is second order in NO and first order in Br₂.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain Stephen's reaction.
2)
Formaldehyde and benzaldehyde give Cannizaro reaction but acetaldehyde does not - account for this.
3)
How is carboxylic acid prepared from alcohols?
4)
Write a note on
(i) Perkin's reaction, and
(ii) Knoevenagal reaction.
5)
What happens when the following compounds are treated with dilute NaOH solution in cold?
(i) propanal
(ii) (CH₃)₃C-CHO

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are Lewis acids and bases? Give two example for each.
2)
Discuss the Lowry – Bronsted concept of acids and bases.
3)
Calculate the concentration of OH^- in a fruit juice which contains \(2\times10^{-3}\) M, H₃O⁺ ion. Identify the nature of the solution.
4)
Calculate the pH of 0.001M HCl solution
5)
Calculate pH of 10^-7M HCl

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How will you convert benzaldehyde to
(I) C₆H₅COOH
(ii) C₆H_sCH₂OH
(iii) C₆HSCH₃
2)
What is Malachite green dye? Explain its preparation?
3)
Formic acid reduces Tollen's reagent but acetic acid does not - Give reasons.
4)
Write the structure of 'A' and 'B' in the following reaction
\({ C }_{ 6 }{ H }_{ 5 }MgBr+{ CO }_{ 2 }\overset { (i)CO_{ 2 } }{ \underset { (ii){ H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow } } A\overset { { Br }_{ 2 } }{ \underset { FeBr_{ 3 } }{ \longrightarrow } } B\)
5)
Give the IUPAC names for the following:
(i) Crotonaldehyde
(ii) Methyl n-propyl ketone
(iii) Phenyl acetaldehyde.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Identify the conjugate acid base pair for the following reaction in aqueous solution
i) HS^- (aq) + HF \(\rightleftharpoons \) F^-(aq) + H₂S(aq)
ii) HPO^2-₄+ SO₃^2- \(\rightleftharpoons \) PO₄^3-+ HSO₃^-
iii) NH₄⁺+ CO₃^2- \(\rightleftharpoons \) NH₃+ HCO₃^-
2)
Account for the acidic nature of HClO₄ in terms of Bronsted – Lowry theory, identify its conjugate base.
3)
When aqueous ammonia is added to CuSO₄ solution, the solution turns deep blue due to the formation of tetra ammine copper (II) complex,\({ [Cu({ H }_{ 2 }O)_4] }_{ (aq) }^{ 2+ }+ 4{ NH }_{ 3 }(aq)\rightleftharpoons { [Cu{ ({ NH }_{ 3 }) }_{ 4 }] }_{ (aq) }^{ 2+ }\) among H₂O and NH₃ Which is stronger Lewis base.
4)
The concentration of hydroxide ion in a water sample is found to be 2.5 × 10^-6M. Identify the nature of the solution.
5)
A lab assistant prepared a solution by adding a calculated quantity of HCl gas 25⁰C to get a solution with [H₃O⁺] = 4\(\times\)10^-5M. Is the solution neutral (or) acidic (or) basic.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain Levine and hauser acetylation.
2)
How can the following conversion be effected?
i) Nitrobenzene to anisole
ii) Chloro benzene to phenyl hydrazine
iii) Aniline to benzoic acid
iv) Benzene diazonium chloride to ehtyl benzene.
3)
How are the following compounds obtained from benzene diazonium chloride?
(i) phenol
(ii) ester
(iii) p-hydroxy azo benzene
4)
Write a note on structure of amine.
5)
An organic compound 'A' on reduction gives compound 'B' which on reaction with trichloromethane and caustic potash forms 'C'. Compound 'C' on catalytic reduction given N-methyl benzenamine. Identify A, B and C and write the reactions involved.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Define anode and cathode
2)
Why does conductivity of a solution decrease on dilution of the solution.
3)
State Kohlrausch Law. How is it useful to determine the molar conductivity of weak electrolyte at infinite dilution.
4)
Describe the electrolysis of molten NaCl using inert electrodes
5)
The resistance of a conductivity cell is measured as 190 Ω using 0.1M KCl solution (specific conductance of 0.1M KCl is 1.3 Sm^-1). When the same cell is filled with 0.003 M sodium chloride solution, the measured resistance is 6.3KΩ. Both these measurements are made at a particular temperature. Calculate the specific and molar conductance of NaCl solution.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An Organic compound (A) with molecular formula C₆H₇N gives (B) with HNO₂ / HCI at 273 K. The aqueous solution of (B) on heating gives compound (C) which gives violet colour with netural FeCI₃. Identify the compounds (A), (B) and (C) and write the equations.
2)
Outline the preparation of (a) para nitroaniline from aniline, (b) tri bromo benzene from tribromo aniline
3)
Aniline reacts with Br₂/H₂O to give a tribromo derivative. How would you convert aniline to get a monobromo derivate?
4)
Convert aniline to p-nitro aniline
5)
Starting from the following reagents, how will your prepare ethanenitrile.
i) CH₃Br
ii) CH₃CONH₂
iii) CH₃CH=NOH

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Describe the construction of Daniel cell. Write the cell reaction.
2)
Why is anode in galvanic cell considered to be negative and cathode positive electrode?
3)
Which of 0.1M HCl and 0.1 M KCl do you expect to have greater \(\stackrel{0}{\Lambda}_{\mathrm{m}}\)and why?
4)
A conductivity cell has two platinum electrodes separated by a distance 1.5 cm and the cross sectional area of each electrode is 4.5 sq cm. Using this cell, the resistance of 0.5 N electrolytic solution was measured as 15 Ω. Find the specific conductance of the solution.
5)
Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is 12.04 x 10^-2 Sm^-1.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
In a coagulation experiment 10 mL of a colloid (X) is mixed with distilled water and 0.1M solution of an electrolyte AB so that the volume is 20 mL. It was found that all solutions containing more than 6.6 mL of AB coagulate with in 5 minutes. What is the flocculation values of AB for sol (X)?
2)
The mechanism of Fridel crafts reaction is given below
\({ C }_{ 6 }{ H }_{ 5 }+{ { CH }_{ 3 }Cl\overset { anhydrous\\ \quad { Alcl }_{ 3 } }{ \longrightarrow } }{ C }_{ 6 }{ H }_{ 5 }{ CH }_{ 3 }+HCl\)
3)
Thermal decomposition of KClO₃ in presence of MnO₂ proceeds as follows.
Steps in the reaction 2KClO₃ → 2KCl + 3O₂can be given as
4)
Formation of water due to the reaction of H₂ and O₂ in the presence of Cu proceeds as follows. Steps in the reaction H₂ + 1/2O₂ → H₂O can be given as

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give two important characteristics of physisorption.
2)
Differentiate physisorption and chemisorption.
3)
In case of chemisorption, why adsorption first increases and then decreases with temperature?
4)
Which will be adsorbed more readily on the surface of charcoal and why? NH₃ or CO₂?
5)
Heat of adsorption is greater for chemisorptions than physisorption. Why?

12th Standard English Medium Chemistry Subject Biomolecules Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Draw the structure of α -D fructose furanose and β - D fructose furanose.
2)
Why sucrose is called invert sugar?
3)
ExpIain the classification of proteins based on their structure.
4)
What are carbohydrates? Give two examples.
5)
Write a note on tertiary structure of proteins.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Predict the major product, when 2-methyl but -2-ene is converted into an alcohol in each of the following methods.
(i) Acid catalysed hydration
(ii) Hydroboration
(iii) Hydroxylation using Baeyer's reagent
2)
Arrange the following in the increasing order of their boiling point and give a reason for your ordering
(i) Butan – 2- ol, Butan -1-ol, 2 –methylpropan -2-ol
(ii) Propan -1-ol, propan -1,2,3-triol, propan -1,3 – diol, propan -2-ol
3)
Can we use nucelophiles such as NH₃,CH₃O ^- for the Nucleophilic substitution of alcohols
4)
Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.

12th Standard English Medium Chemistry Subject Biomolecules Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Amino acids are amphoteric in nature. Explain.
2)
How do enzymes help a substrate to be attacked by the reagent effectively?
3)
Give the structure of sucrose.
4)
Write the monomers of the following sugars and explain how they are linked.
(i) Sucrose
(ii) Maltose
(iii) Lactose
5)
Name the two components starch is made up of. How do they differ from each other.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.
2)
Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.
3)
Suggest a suitable reagent to prepare secondary alcohol with identical group using Grignard reagent.
4)
What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
State the laws of reflection.
2)
What is angle of deviation due to reflection?
3)
Give the characteristics of image formed by a plane mirror.
4)
Derive the relation between f and R for a spherical mirror.
5)
What are the Cartesian sign conventions for a spherical mirror?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How is Low density polyethene prepared?
2)
The monomer is capro lactam Identify the polymer when the monomer is heated at 533K.
3)
Give the condensation reaction between urea and formaldehyde. Identify the polymer.
4)
How is Buna - N prepared? Give its use.
5)
Give examples for
(i) addition polymer,
(ii) Synthetic rubbers,
(iii) Condensation polymers,
(iv) formaldehyde resins.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How is propanoic acid is prepared starting from
(a) an alcohol
(b) an alkylhalide
(c) an alkene
2)
A Compound (A) with molecular formula C₂H₃N on acid hydrolysis gives (B) which reacts with thionylchloride to give compound(C). Benzene reacts with compound (C) in presence of anhydrous AlCl₃ to give compound(D). Compound (D) on reduction with Zn/Hg and Conc.HCl gives (E). Identify (A), (B), (C) (D) and (E). Write the equations.
3)
Identify X and Y.
\({ CH }_{ 3 }CO{ CH }_{ 2 }{ CH }_{ 2 }COO{ C }_{ 2 }{ H }_{ 5 }\overset { { CH }_{ 3 }MgBr }{ \longrightarrow } X\overset { { H }_{ 3 }{ O }^{ + } }{ \longrightarrow } Y\)
4)
Identify A, B and C
5)
A hydrocarbon A (molecular formula C₈H₁₀) on ozonolysis gives B (C₄H₆O₂) only. Compound C (C₃H₅Br) on treatment with magnesium in dry ether gives (D) which on treatment with CO₂followed by acidification gives(C). Identify A, B and C.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give the structure of melamine formaldehyde resin.
2)
How is Nylon - 6,6 prepared? Give it use.
3)
Write the preparation of neoprene and give its use.
4)
Identify the polymer and write the reaction involved.
(i) Buta-1,3-diene and styrene in the presence of sodium.
(ii) 3 - hydroxy butanoic acid and 3-hydroxy pentanoic acid.
5)
Identify the monomers of the following polymers.

(ii) (NH(CH₂)₆ NHCO (CH₂)₄ CO)n
(iii) \({ CH }_{ 2 }-\underset { \overset { | }{ Cl } }{ C } =CH-{ CH }_{ 2 })_{ n }\)

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write a note on drug target interaction.
2)
Explain Receptor as drug targets.
3)
Explain the classification of polymers based on their structure and mode of synthesis.
4)
Styrene polymerises to polystyrene when heated in the presence of peroxide initiator.
(i) What is the mechanism involved?
(ii) Give the initiation step for the above process.
(iii) How does the chain propogate in the above mechanism?
(iv) How is the above chain reaction terminated?
5)
Explain the prepareation of Bakelite and Give its use.

12th Standard English Medium Chemistry Subject Biomolecules Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give the uses of carbohydrates.
2)
Elucidate the structure of fructose.
3)
List the importance of proteins in biological processes.
4)
Outline the classification of carbohydrates giving example for each.
5)
Show the formation of a peptide bond with an equation.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write down the possible isomers of the C₄H₉NO₂ give their IUPAC names.
2)
There are two isomers with the formula CH₃NO₂. How will you distinguish between them?
3)
What happens when
i. 2 – Nitropropane boiled with HCl
ii. Nitrobenezene undergo electrolytic reduction in strongly acidic medium.
iii. Oxidation of tert – butylamine with KMnO₄
iv. Oxidation of acetoneoxime with trifluoroperoxy acetic acid
4)
How will you convert nitrobenzene into
i. 1,3,5 - trinitrobenzene
ii. o and p- nitrophenol
iii. m – nitro aniline
iv. azoxybenzene
v. hydrozobenzene
vi. N – phenylhydroxylamine
vii. aniline
5)
Identify compounds A, B and C in the following sequence of reactions.
i) \({ C }_{ 6 }{ H }_{ 5 }NO_{ 2 }\overset { Fe/HCL }{ \longrightarrow } A\overset { HN{ O }_{ 2 } }{ \underset { 273K }{ \longrightarrow } } B\overset { { C }_{ 6 }{ H }_{ 5 }OH }{ \longrightarrow } C\)
ii) \({ C }_{ 6 }{ H }_{ 5 }N_{ 2 }cl\overset { CuCN }{ \longrightarrow } A\overset { H_{ 2 }O/H^{ + } }{ \longrightarrow } B\overset { NH_3 }{ \longrightarrow } C\)
iii) \({ C }{ H }_{ 3 }{ C }{ H }_{ 2 }I\overset { NaCN}{ \longrightarrow } A\overset {OH^-}{ \underset {Partial hydrolysis}{ \longrightarrow } } B\overset {NaOH+Br_2 }{ \longrightarrow } C\)
iv) \({ C }{ H }_{ 3 }NH_{ 2 }\overset { CH_3 Br }{ \longrightarrow } A\overset { CH_{ 3 }COCl}{ \longrightarrow } B\overset { B_2H_6 }{ \longrightarrow } C\)
v) \({ C }_{ 6 }{ H }_{ 5 }NH_{ 2 }\overset { (CH_{ 3 }CO)_{ 2 }O }{ \underset { Pyridine }{ \longrightarrow } } A\overset { HNO_{ 3 } }{ \underset { H_{ 2 }SO_{ 4 },288K }{ \longrightarrow } } B\overset { { H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow C } \)
vi)

vii) \({ C }{ H }_{ 3 }CN_{ 2 }NC\overset { HgO }{ \longrightarrow } A\overset { H_{ 2 }O }{ \longrightarrow } B\overset { i) NaN{ O }_{ 2 }/HCL }{ \underset { ii){ H }_{ 2 }O }{ \longrightarrow } } \)

12th Standard English Medium Chemistry Subject Biomolecules Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Elucidate the structure of glucose.
2)
Define the following terms as related to proteins
(i) Primary structure
(ii) Secondary structure
(iii) β strands
3)
List the importance of proteins in biological processes.
4)
Explain the classification of hormones.
5)
Distinguish glucose from fructose.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What happens when ethylamine is treated with
(i) CHCl₃/NaOH
(ii) CS₂
(iii) C₆H₅CHO.
2)
Account for the following:
(i) Nitroethane is soluble NaOH
(ii) Nitroethane reacts with nitrous acid
(iii) 2-methyl-2-nitro propane has neither of the properties.
3)
Write the differences between nitro methane and nitro benzene.
4)
Write a note on
(i) Carbylamine reaction
(ii) Mustard oil reaction
(iii) Acetylation of benzylamine
(iv) Formation of Schiff's base
(v) Diazotisation reaction
5)
CuSO₄on mixing with NH₃ (1:4 ratio) does not give test for Cu²⁺ ions but gives test for SO₄^2- ions. Why?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Account for the following:
i) (CH₃)₂ NH is stronger base than NH₃
ii) CH₃CH₂NH₂ is more basic than CH₃CONH₂
iii) Aniline is less basic than Ethyl amine
iv) On sulphonation of aniline, p-amino benzene sulphonic acid is formed.
2)
Account for
i) Reduction of CH₃CH gives CH₃CH₂NH₂while CH₃NC gives (CH₃)₂NH.
ii) (CH₃)₂NH requires two molar proportion of CH₃I to give the same crystalline product formed by (CH₃)₂N with one mole of CH₃l.
iii) Nitration of aniline with conc.HNO₃ may end up with same meta nitro product.
iv) p-toluidine is a stronger base than p-nitroaniline.
3)
How can the following coversion be effected?
i) Nitrobenzene ⇾ Nitrosobenzene
ii) Nitrobenzene ⇾ Azoxybenzene
iii) Nitrobenzene ⇾ Hydrazobenzene
4)
How do primary, secondary and tertiary amines react with nitrous acid?
5)
Outline the mechanism of
(a) Nitration of aniline,
(b) Acetylation of aniline.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An organic compound (A) C₂H₃OCI on treatment with Pd and BaSO₄ gives (B) C₂H₄O which answers iodoform test. (B) when treated with cone.H₂SO₄ undergoes polymerisation to give (C) a cyclic compound. Identify (A), (B) and (C) and explain the reactions.
2)
An organic compound (A) with molecular formula C₃H₆O undergoes iodoform reaction. Two molecules of compound (A) react with dry HCI to give compound (B) (C₆H₁₀O). Compound (B) reacts with one more molecule of compound (A) to give compound (C) (C₉H₁₄O). Identify (A), (B) and (C). Explain the reactions.
3)
An organic compound A (C₂H₃N) on reduction with SnCI₂/HCI gives B (C₂H₄O) which reduces Tollen's reagent. Compound B on reduction with N₂H₄/C₂H₅ONa gives C (C₂H₆). Identify the compounds A, B and C. Explain the reactions involved.
4)
An organic compound (A) of molecular formula C₇H₆O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C₇H₆O₂ which gives brisk effervescence with NaHCO₃ solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.
5)
Ail organic compound. (A) C₇H₆O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.

12th Standard English Medium Chemistry Subject Biomolecules Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What type of linkages hold together monomers of DNA?
2)
Give the differences between primary and secondary structure of proteins.
3)
Name the Vitamins whose deficiency cause i) rickets ii) scurvy
4)
Write the Zwitter ion structure of alanine
5)
Give any three difference between DNA and RNA.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Compound (A) with molecular formula C₂H₄O reduces Tollen's reagent. (A) On treatment with HCN gives compound (B). Compound (B) on hydrolysis with an acid gives compound (C) with molecular formula C₃H₆O₃ which is an optically active compound. Compound (A) on reduction with N₂H/C₂H_sONa gives a hydrocarbon (D) of molecular formula C₂H₆. Identify (A), (B), (C) and (D) and explain the reactions.
2)
An organic compound (A) of molecular formula C₇H₆O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C₇H₆O₂ which gives brisk effervescence with NaHCO₃ solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.
3)
Ail organic compound. (A) C₇H₆O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.
4)
An organic compound Aofmolecular formula C₃H₆O answers iodoform test. Another organic compound B of molecular formula C₇H₆O is known as oil of bitter almonds. A reacts with B to form an unsaturated compound C of molecular formula C₁₀H₁₀O. Compound B reacts with malonic acid in the presence of pyridine to form an unsaturated acid D of molecular formula C₉H₅O₂ Identify A, B, C and D. Explain the reactions.
5)
Compound (A) with Molecular formula C₇H₆O does not reduce Fehling's solution. Compound (A) reacts with acetone in the presence of NaOH to give a compound (B) which is an α, β-unsaturated compound. Further (A) reacts with dimethyl aniline in the presence of cone, H₂SO₄ to give compound (C) which is a dye. Identify (A) (B) and (C). Explain the reactions.

12th Standard English Medium Chemistry Subject Biomolecules Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What type of linkages hold together monomers of DNA?
2)
Give the differences between primary and secondary structure of proteins.
3)
Write the Zwitter ion structure of alanine
4)
Give any three difference between DNA and RNA.
5)
Write a short note on peptide bond.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write all possible isomers with molecular formula C₄H₁₀O and name them.
2)
Give short notes on the following: (a) Kolbe's reaction, (b) Riemer - Tiemann reaction
3)
How would you distinguish between (i) methyl alcohol and ethyl alcohol (ii) benzyl alcohol and phenol, (iii) ethyl alcohol and benzyl alcohol?
4)
What are ethers? Write note on simple and mixed ethers with examples.
5)
Compound (A) with molecular formula C₆H₆O gives violet colour with neutral ferric chloride. (A) reacting with CCI₄ and NaOH gives two isomers (B) and (C). (A) on oxidation with CrO₂Cl₂ gives (D) of molecular formula C₆H₄O₂. Identity A, B, C and D. Explain the reactions.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 2 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which chemical is responsible for the antiseptic properties of dettol.
2)
What are antibiotics?
3)
Name one substance which can act as both analgesic and antipyretic.
4)
Write a note on synthetic detergents
5)
How do antiseptics differ from disinfectants?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An organic compound (A) C₂H₆O liberates hydrogen on treatment with metallic sodium. (A) on mild oxidation gives (B) C₂H₄O which answers iodoform test. (B) when treated with cone. H₂SO₄undergoes polymerisation to give (C) a cyclic compound. Identify (A) (B) and (C) and explain the reactions.
2)
An organic compound A of molecular formula C₃H₆O on reduction with LiAlH₄ gives B. Compound B gives blue colour in Victor Meyer's test and also forms a chloride C with SOCl₂. The chloride on treatment with alcoholic KOH gives D. Identify A, B, C and D and explain the reactions.
3)
An organic compound (A) of molecular formula C₃H₈O₂ is obtained as by-product in the manufacture of soap. Compound (A) on heating with P₂O₅ gives an unsaturated compound (B) of molecular formula C₃H₄O. Compound (A) with well cooled mixture of Conc.H₂SO₄ and fuming HNO₃ form compound (C) which is an explosive. Identify A, B and C and explain the rection.
4)
An organic compound (A) C₆H₆O gives violet colour with neutral FeCl₃ solution. With NH₃ in the presence of anhydrous ZnCI₂, (A) gives (B) (C₆H₇N). (A) with dimethyl sulphate gives (C) (C₇H₈O). What are (A), (B) and (C)? Explain the reactions.
5)
An organic compound 'A' is a sodium salt of phenolic acid with molecular formula C₇H₅O₃Na. 'A' on heating with soda lime gives compound 'B' of molecular formula C₆H₆O. 'B' gives violet colour with neutral ferric chloride. 'B' on treatment with C₆H₅COCI in the presence of NaOH gives an ester 'C'. Identify 'A', 'B' and 'C'. Explain the reactions.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 2 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Which chemical is responsible for the antiseptic properties of dettol.
2)
What are antibiotics?
3)
Name one substance which can act as both analgesic and antipyretic.
4)
How do antiseptics differ from disinfectants?
5)
What are food preservatives?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write the characteristics of adsorption.
2)
Write a note on Freundlich adsorption isotherm.
3)
Give the special characteristics of enzyme catalysed reactions.
4)
Explain the following
(i) Reactant selectivity
(ii) Transition state selectivity
(iii) Product selectivity
5)
Explain electrodialysis

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write the characteristics of catalysts.
2)
Write a note on phase transfer catalysis.
3)
Explain the various chemical methods by which colloids can be prepared.
4)
Explain the electrical property of colloids with a neat diagram. (or) Write a note on Helmholta electrical double layer.
5)
Write any five applications of colloids in day - to day life.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The standard reduction potential for the reaction Sn⁴⁺ + 2e^- ⟶ Sn²⁺ is + 0.15v. Calcuate the free energy change of the reaction.
2)
The emf of the cell Cd/CdCl₂, 25H₂O / AgCI_(s)Ag E^o is 0.675 V. Calculate of the cell reaction.
3)
The emf of the half cell Cu²⁺_(aq)/ Cu_(s). containing 0.01 M Cu²⁺solution is + 0.301V. Calculate the standard emf of the half cell
4)
Calculate the standard emf of the cell having the standard free energy change of the cell reaction is -64.84 kJ for 2 electrons transfer.
5)
The equilibrium constant of cell reaction: Ag_(s)+ Fe³⁺ ⇌ Fe²⁺+ Ag⁺ is 0.335 at 25°C. Calculate the standard emf of the cell AgI Ag⁺; Fe³⁺, Fe²⁺/Pt. Calculate E^o of the half cell Fe³⁺, Fe²⁺/Pt is 0.7791 V. Calculate E^o of Fe³⁺, Fe²⁺/ Pt half cell.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Calculate the emf of the cell Zn/ZnO₂, OH^-, HgO/Hg given that E^o values of OH^-, ZnO and OH^-, HgO/Hg half cells are -1.216 V and 0.098 V respectively.
2)
Calculate the emf of the cell having the cell reaction 2Ag⁺ + Zn ⇌ 2Ag + Zn²⁺ and E^o_cell= 1.56 V at 25°C when concentration of Zn²⁺ = 0.1 M and Ag⁺ = 10 M in the solution.
\([{ E }_{ cell }={ E }_{ cell }^{ o }-\frac { RT }{ nF } In\frac { [{ Zn }^{ 2+ }] }{ [{ Ag] }^{ 2 } } ]\)
3)
How will you determine the conductivity of an electrolytic solution using a wheatstone, bridge?
4)
Explain SHE as a reference electrode.
5)
Write the electrochemical mechanism of corrosion.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
A buffer solution containing 0.1 mole of ammonium hydroxide and 0.15 mole of ammonium chloride per litre of the solution. Calculate the pH of the buffer solution. K_b for ammonium hydroxide is 1.8 x 10^-5.
2)
Calculate the pH of 0.1 M NH₄OH if Kb = 1.75 x 10^-5
3)
Explain buffer action in an acidic buffer.
4)
On hydrolysis of salts of strong acid and strong base, the solution obtained is neutral. Justify your answer with a suitable example
5)
Derive the hydrolysis constant for the hydrolysis of salt of strong base and weak acid. Deduce its pH.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Calculate the pH of 0.02 m Ba(OH)₂ aqueous solution assuming Ba(OH)₂ as a strong electrolyte.
2)
Calculate the pH of 0.001 M HCI solution.
3)
If a solution has a pH of 7.41, determine its H⁺ concentration.
4)
The degree of dissociation of acetic acid in 0.1 M solution is 0.04. Calculate K_a for acetic acid. Where a is the degree of dissociation, C is the concentration of the acid in moles/ lit.
5)
A 0.02 M solution of a weak mono basic acid is 5% ionised. Calculate the ionisation constant of the acid.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
A first order reaction laws on rate constant 1.15 x 10^-3 S^-1. How long will 5 g of this reactant take to reduce to 3g?
2)
Reaction is first order in A and second in B.
(i) Write the different rate equation.
(ii) How is the rate affected on increasing the concentration of B three times?
(iii) How is the rate affected when the concentrations of both A and B are doubled?
3)
Rate constant of a first order reaction is 0.45 sec^-1, calculate its half life.
4)
If 30% of a first order reaction is completed in 12 mins, what percentage will be completed in 65.33 mins?
5)
The half life period of first order reactions is 10 mins. What percentage of the reactant will remain after one hour?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
For the reaction 2A + B ⟶ A₂B. The rate = k [A] [B]² with k = 2.0 x 10^-6 mol? L²S^-1. Calculate the initial rate of the reaction, when [A] = 0.1 mol L^-1, [B] = 0.2 mol L^-1. Calculate the rate of reaction after [A] is reduced to 0.06 mol L^-1
2)
In a pseudo first order hydrolysis of ester in water, the following results were obtained.

1 0 30 60 90

[Ester]mol L^-1 0.55 0.31 0.17 0.085

(i) Calculate the average rate of reaction between the time interval 30 to 60 seconds.
(i) Calculate the pseudo first order rate constant for the hydrolysis of ester.
3)
Write an account of the Arrhenius equation for rates of chemical reactions.
4)
For the reaction R - P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and second.
5)
A first order reaction laws on rate constant 1.15 x 10^-3 S^-1. How long will 5 g of this reactant take to reduce to 3g?

1	0	30	60	90
[Ester]mol L^-1	0.55	0.31	0.17	0.085

12th Standard English Medium Chemistry Subject Solid State Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body - centre. What is the formula of the compound? What is the coordination numbers of P and Q?
2)
What are molecular solids? Explain the types of molecular solids.
3)
How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain.
4)
How are crystals classified?
5)
Write note on impurity defect?

12th Standard English Medium Chemistry Subject Solid State Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Ionic solids, which have anionic vacancies due to metal excess defect, develop colour. Explain with the help of a suitable example.
2)
What are the general characteristics of solids?
3)
An element with molar mass 2.7 x 10^-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 10³ kg m^-3, What is the nature of the cubic unit cell?
4)
Explain the following: Similarities and differences between metallic and ionic crystals.
5)
What are stoichiometric defects in ionic solids? Explain

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
For the complex [NiCI₄]^2- write (i) the IUPAC name (ii) The hybridisation type (iii) The shape of the complex
2)
How are Co-ordination compounds classified?
3)
What are the salient feature of crystal field theory?
4)
How are metal carbonyls classified based on the structure?
5)
Give the structure for the following compounds.
(i) pentaamminechlorocobalt (III) ion
(ii) Triamminetrinitrito- k N cobalt (III)
(ill) tetraammineaquabromidooobalt(III)nitrate
(iv) Dichloridobisethane-(1,2-diamine) cobalt (lIl) chloride
(v) Tetraamminecopper (lI) sulphate

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
(i) K[Cr(H₂O)₂(C₂O₄)₂]
(ii) [Co(en)₃]CI₃
(iii) [Co(NH₃)₅(NO₂)](NO₃)₂
(iv) [Pt (NH₃)(H₂O)CI₂]
2)
What is meant by stability of a co-ordination compound in solution? State the factors which govern stability of complexes.
3)
What are the main assumptions of Valence Bond Theory? Explain.
4)
How are metal carbonyls classified depending on the number of metal atoms?
5)
Give the IUPAC name for the following compounds.
(i) [Ag(NH₃)₂]CI
(ii) K₃[Fe(CN)₅NO]
(ill) [Cr(PPh₃)(CO)₃]
(iv) [Ag(NH₃)₂]⁺
(v) [FeF₆]^4-

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Justify the following statement.
"Elements of the first transition series possess many properties different from those of heavier transition elements".
2)
Why is there a variation of atomic and ionic size as we move from Sc to Zn?
3)
Write a note on the ionization enthalpy of transition elements.
4)
Write a short note on the oxidation states of 3d series elements.
5)
How are materials classified based on their magnetic properties?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain the oxidising and reducing property of SO₂·
2)
Explain the oxidising property of sulphuric acid.
3)
How does sulphuric acid react with metals at various conditions.
4)
How is chlorine manufactured by the electrolysis of brine.
5)
Explain the bleaching action of Chlorine.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are the properties of inter halogen compounds?
2)
(i) \(\mathrm{PCl}_{5}+\mathrm{Ag} \longrightarrow \text { ? } \)
(ii) \(\mathrm{AgCl}_{(s)}+\mathrm{NH}_{3(\mathrm{aq})} \longrightarrow ? \)
(iii) \(\mathrm{PCl}_{3} \stackrel{\text { Moist air }}{\longrightarrow} \text { ? } \)
(iv) \(\mathrm{PCl}_{5} \stackrel{\text { Moist air }}{\longrightarrow} ? \)
(v) \(\mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{HCl} \longrightarrow ?\)
3)
An element A occupies group number 15 and period number 3, exhibits allotropy and it is tetra atomic. A reacts with caustic soda to give B which is having rotten fish odour. A reacts with chlorine to give C which has a pungent odour Identify A, B and C. Write the reactions.
4)
An element 'A' occupies group number 15 and period number 3. It reacts with chlorine to give B which further reacts with chlorine to give C at 273K. Both B and C are chlorinating agents for organic compounds. C is a better chlorinating agent because it chlorinates metals also. Breasts with SO₃ and reduces it to SO₂ B has a pyramidal shape. C has trigonal bipyramidal shape by sp³d hybridisation. Identify the element A and the compounds B and C. Write the reactions.
5)
An element A occupies group number 15 and period number 3, reacts with chlorine to give compound B. The compound B on hydrolysis gives a dibasic acid C. The compound C on heating undergoes auto oxidation and reduction to give a tribasic acid D. Identify the elements A compounds B, C and D. Write the reactions.

12th Standard English Medium Chemistry Subject Metallurgy Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain concentration by magnetic separation with diagram.
2)
Explain refining of nickel by mond's process
3)
List out the application of aluminum.
4)
How can you separate alumina from silica in a bauxite ore.
5)
Write short note on the following:
(i) The process in which no external reducing agent is used.
(ii) The process which is used for highly electro positive metal.
(iii) Write the equation involved in the thermite process.

12th Standard English Medium Chemistry Subject Metallurgy Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain froth flotation, with diagram.
2)
In the extraction of copper, explain the smelting process.
3)
Explain refining of titanium by Van-Arkel method.
4)
List the applications of iron.
5)
What is zone refining? Describe the principle involved in the purification of the metal by this method.

12th Standard English Medium Chemistry Subject Creative 1 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Among the following, one does not belong to calcination, Pick the odd one out.
2)
S-S bond is present in _______.
3)
Which of the following is coloured due to charge transfer?
4)
The spin only magnetic moment of [Mnfsr₄]^2- is 5.9 BM. Geometry of the complex ion is _______.
5)
Which of the following is characteristic of ionic solids?

12th Standard English Medium Chemistry Subject Creative 1 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
A crystal which has the same unit cell and contains the same lattice points throughout the crystal is_________.
2)
In the acid hydrolysis of an ester, what is the time taken for complete hydrolysis?
3)
pH of a solution can be kept constant with the help of __________ solution.
4)
SHE is _______.
5)
Argyrol is_______.

12th Standard English Medium Chemistry Subject Creative 2 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is meant by concentration?
2)
Mention the physical properties of boranes.
3)
Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?
4)
Why lanthanoids are called f block elements?
5)
Write the IUPAC name of the complex.

12th Standard English Medium Chemistry Subject Creative 2 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are anionic & cationic complex? Give an example.
2)
What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?
3)
Explain how will you find activation energy of a reaction by graphical method.
4)
Give an example of secondary cell.
5)
Why colloidal system in gas in gas does not exist?

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Before reduction, the ore is first converted into the oxide of metal of interest. Give reason
2)
How is aluminum chloride prepared from aluminum?
3)
Why do noble gases form compounds with fluorine and oxygen only?
4)
What are the general properties of f-block elements? (Lanthanides and Actinides)
(i) Electronic configuration
(ii) Oxidation state
(iii) Radii of tripositive ions.
5)
Aqueous copper sulphate solution (blue) gives
(i) a green precipitate with aqueous potassium fluoride.
(ii) a bright green solution with aqueous potassium chloride. Explain these experimental results.

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
State Bragg's law.
2)
What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?
3)
What is Henderson equation?
4)
What is salt bridge? How is it represented in a cell diagram?
5)
Wha tare catalyticpoisons? Give an example.

12th Standard English Medium Chemistry Subject Creative 5 Mark Questions with Solution Part - I updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
In the extraction of copper, explain the smelting process.
2)
How are silicates classified? Give an example for each type of silicate.
3)
Mention the uses of helium.
4)
Why is there a variation of atomic and ionic size as we move from Sc to Zn?
5)
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
(i) K[Cr(H₂O)₂(C₂O₄)₂]
(ii) [Co(en)₃]CI₃
(iii) [Co(NH₃)₅(NO₂)](NO₃)₂
(iv) [Pt (NH₃)(H₂O)CI₂]

12th Standard English Medium Chemistry Subject Creative 5 Mark Questions with Solution Part - II updated Creative Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An element with molar mass 2.7 x 10^-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 10³ kg m^-3, What is the nature of the cubic unit cell?
2)
A first order reaction completes 25% of the reaction in 100 mins. What are the rate constant and half life values of the reaction?
3)
Derive Henderson - Hasselbalch equation
4)
Derive a relationship between dissociation constant K_a and molar conductivity \({ \Lambda }_{ m }\)
5)
Explain the various chemical methods by which colloids can be prepared.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain zone refining process with an example.
2)
Using the Ellingham diagram,
(A) Predict the conditions under which
(i) Aluminium might be expected to reduce magnesia.
(ii) Magnesium could reduce alumina.
(B) it is possible to reduce Fe₂O₃ by coke at a temperature around 1200K
3)
Explain the electrometallurgy of aluminium.
4)
Explain the following terms with suitable examples.
(i) Gangue
(ii) slag
5)
Give the basic requirement for vapour phase refining.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain zone refining process with an example.
2)
Using the Ellingham diagram,
(A) Predict the conditions under which
(i) Aluminium might be expected to reduce magnesia.
(ii) Magnesium could reduce alumina.
(B) it is possible to reduce Fe₂O₃ by coke at a temperature around 1200K
3)
Give the uses of zinc.
4)
Explain the electrometallurgy of aluminium.
5)
Give the basic requirement for vapour phase refining.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give the uses of silicones.
2)
Describe the structure of diborane.
3)
Give one example for each of the following
(i) icosogens
(ii) Tetragens
(iii) pnictogens
(iv) chalcogens
4)
Write a note on metallic nature of p-block elements.
5)
Complete the following reactions.
a. \(B(OH)_3 + NH_3\longrightarrow \)
b. \(Na_{ 2 }B_{ 4 }{ O }_{ 7 }+{ { H }_{ 2 }{ SO }_{ 4 }+{ 5H }_{ 2 }O\longrightarrow }\)
c. \({ B }_{ 2 }{ H }_{ 6 }+2NaOH+2{ H }_{ 2 }O\longrightarrow \)
d. \({ B }_{ 2 }{ H }_{ 6 }+6{ CH }_{ 3 }OH\longrightarrow \)
e. \(4{ BF }_{ 3 }+3{ H }_{ 2 }O\longrightarrow \)
f. \(HCOOH+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow \)
g. \(2SiCl_{ 4 }+NH\)₃
h. SiCl₄ + 4C₂H₅OH \(\rightarrow\)
i. 2\(B+6NaOH\longrightarrow \)
j. \({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\ hot }{ \rightarrow } \)

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give the uses of silicones.
2)
AlCl₃behaves like a lewis acid. Substantiate this statement.
3)
Describe the structure of diborane.
4)
Write a short note on hydroboration.
5)
Write a note on metallic nature of p-block elements.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH.
2)
How will you prepare chlorine in the laboratory?
3)
Give the uses of sulphuric acid.
4)
Write the valence shell electronic configuration of group-15 elements.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give the uses of sulphuric acid.
2)
Give a reason to support that sulphuric acid is a dehydrating agent.
3)
Write the reason for the anomalous behaviour of Nitrogen.
4)
Write the molecular formula and structural formula for the following molecules.
a) Nitric acid
b) Dinitrogen pentoxide
c) phosphoric acid (PTA)
d) phosphine

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are interstitial compounds?
2)
Calculate the number of unpaired electrons in Ti³⁺ , Mn²⁺ and calculate the spin only magnetic moment.
3)
Write the electronic configuration of Ce⁴⁺ and Co²⁺.
4)
Compare the ionization enthalpies of first series of the transition elements.
5)
Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.
2)
Which is more stable? Fe³⁺ or Fe²⁺? Why ?
3)
Explain the variation in E⁰_{M³⁺/M²⁺} 3d series.
4)
Compare lanthanoids and actinoids.
5)
Explain why Cr²⁺ is strongly reducing while Mn³⁺ is strongly oxidizing.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give an example for complex of the type [Ma₂b₂c₂] where a, b, c are monodentate ligands and give the possible isomers.
2)
In an octahedral crystal field, draw the figure to show splitting of d orbitals
3)
Write briefly about the applications of coordination compounds in volumetric analysis
4)
Give the difference between double salts and coordination compounds.
5)
[Ni(CN)₄]^2- is diamagnetic, while [NiCl₄]^2- is paramagnetic, explain using crystal field theory.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give one test to differentiate [Co(NH₃)₅Cl]SO₄ and [Co(NH₃)₅SO₄]Cl.
2)
What is linkage isomerism? Explain with an example.
3)
Classify the following ligands based on the number of donor atoms.
a) NH₃
b) en
c) ox^2-
d) pyridine
4)
Write the postulates of Werner’s theory.
5)
Why tetrahedral complexes do not exhibit geometrical isomerism.

12th Standard English Medium Chemistry Subject Solid State Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain Schottky defect.
2)
Calculate the number of atoms in a fcc unit cell.
3)
Why ionic crystals are hard and brittle?
4)
What is the two dimensional coordination number of a molecule in square close packed layer?

12th Standard English Medium Chemistry Subject Solid State Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write short note on metal excess and metal deficiency defect with an example.
2)
Explain AAAA and ABABA and ABCABC type of three dimensional packing with the help of neat diagram.
3)
Calculate the percentage efficiency of packing in case of body centered cubic crystal.
4)
Experiment shows that Nickel oxide has the formula Ni_0.96.O_1.00. What fraction of Nickel exists as of Ni²⁺ and Ni³+ ions?

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The decomposition of Cl₂O₇ at 500K in the gas phase to Cl₂ and O₂ is a first order reaction. After 1 minute at 500K, the pressure of Cl₂O₇ falls from 0.08 to 0.04 atm. Calculate the rate constant in s^-1
2)
Explain pseudo first order reaction with an example.
3)
A gas phase reaction has energy of activation 200 kJ mol^-1. If the frequency factor of the reaction is 1.6 x 10¹³s^-1. Calculate the rate constant at 600 K.(e^-40.09= 3.8 x 10^-48)
4)
A first order reaction takes 8 hours for 90% completion. Calculate the time required for 80% completion. (log 5 = 0.6989 ; log10 = 1)
5)
Show that in case of first order reaction, the time required for 99.9% completion is nearly ten times the time required for half completion of the reaction.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
For a reaction x + y + z\(\longrightarrow \) products the rate law is given by rate =k[x]^3/2[y]^1/2. What is the overall order of the reaction and what is the order of the reaction with respect to z.
2)
Write Arrhenius equation and explains the terms involved.
3)
Hydrolysis of methyl acetate in aqueous solution has been studied by titrating the liberated acetic acid against sodium hydroxide. The concentration of an ester at different temperatures is given below.

t(min) 0 20 40 60 ∝

v (ml) 20.2 25.6 29.5 32.8 50.4

Show that the reaction is the first order reactions.
4)
Identify the order for the following reactions
(i) Rusting of Iron
(ii) Radioactive disintegration of ₉₂U²³⁸
(iii) 2A+3B⟶ products ;rate = k[A]^1/2[B]²
5)
For the reaction 2x+y ⟶ L find the rate law from the following data.

[x]
(min) [y]
(min) rate
(ms^-1)

0.2 0.02 0.15

0.4 0.02 0.30

0.4 0.08 1.20

t(min)	0	20	40	60	∝
v (ml)	20.2	25.6	29.5	32.8	50.4

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Define pH.
2)
50ml of 0.05M HNO₃ is added to 50ml of 0.025M KOH. Calculate the pH of the resultant solution.
3)
Calculate the extent of hydrolysis and the pH of 0.1 M ammonium acetate Given that \(K_{a}=K_{b}=1.8\times10^{-5}\)
4)
A solution of 0.10M of a weak electrolyte is found to be dissociated to the extent of 1.20% at 25^oC. Find the dissociation constant of the acid.
5)
Find the pH of a buffer solution containing 0.20 mole per litre sodium acetate and 0.18 mole per litre acetic acid. K_a for acetic acid is \(1.8\times10^{-5}\).

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Derive an expression for Ostwald’s dilution law.
2)
Calculate the pH of 1.5\(\times\)10^-3M solution of Ba(OH)₂
3)
The K_a value for HCN is 10^-9. What is the pH of 0.4M HCN solution?
4)
Derive an expression for the hydrolysis constant and degree of hydrolysis of salt of strong acid and weak base.
5)
Calculate the pH of 0.1M CH₃COOH solution. Dissociation constant of acetic acid is \(1.8\times10^{-5}\).

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Arrange the following solutions in the decreasing order of specific conductance.
i) 0.01M KCl
ii) 0.005M KCl
iii) 0.1M KCl
iv) 0.25M KCl
v) 0.5M KCl
2)
0.1M NaCl solution is placed in two different cells having cell constant 0.5 and 0.25 cm^-1 respectively. Which of the two will have greater value of specific conductance.
3)
Can Fe³⁺ oxidises Bromide to bromine under standard conditions?
Given: \({ E }_{ { Fe }^{ 3+ }|{ Fe }^{ 2+ } }^{ 0 }=0.771V\); \(\\ { E }^{0}_{ { Br }_{ 2 }|{ Br }^{ - } }=1.09V\).
4)
Two metals M₁ and M₂ have reduction potential values of -xV and +yV respectively. Which will liberate H₂ and H₂SO₄.
5)
A solution of silver nitrate is electrolysed for 20 minutes with a current of 2 amperes. Calculate the mass of silver deposited at the cathode.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
The conductivity of a 0.01M solution of a 1 :1 weak electrolyte at 298K is 1.5\(\times\)10^-4 S cm⁻¹.
i) molar conductivity of the solution
ii) degree of dissociation and the dissociation constant of the weak electrolyte
Given that
\(\lambda^{0}_{cation}=248.2 \ S\) cm² mol^-1
\(\lambda^{0}_{anlon}=51.8 \ S\) cm² mol^-1
2)
Why is AC current used instead of DC in measuring the electrolytic conductance?
3)
A current of 1.608A is passed through 250 mL of 0.5M solution of copper sulphate for 50 minutes. Calculate the strength of Cu²⁺ after electrolysis assuming volume to be constant and the current efficiency is 100%.
4)
Is it possible to store copper sulphate in an iron vessel for a long time?
Given : \(E^{0}_{Cu^{2+}|Cu} = 0.34\) V and \(E^{0}_{Fe^{2+}|Fe} = -0.44\)V.
5)
Reduction potential of two metals M₁ and M₂ are \(E^{0}_{M^{2+}_{1}|M_{1}} = -2.3V\) and \(E^{0}_{M^{2+}_{1}|M_{1}} = 0.2V\) Predict which one is better for coating the surface of iron. Given : \(\mathrm{E}_{\mathrm{Fe}^{2+} \mid \mathrm{Fe}}^{\circ}=-0.44 \mathrm{~V}\)

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Peptising agent is added to convert precipitate into colloidal solution. Explain with an example.
2)
What is the difference between a sol and a gel?
3)
Addition of Alum purifies water. Why?
4)
What are enzymes? Write a brief note on the mechanism of enzyme catalysis.
5)
Describe some feature of catalysis by Zeolites.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What happens when a colloidal sol of Fe(OH)₃ and As₂S₃ are mixed?
2)
Why are lyophillic colloidal sols are more stable than lyophobic colloidal sol.
3)
What are the factors which influence the adsorption of a gas on a solid?
4)
What do you mean by activity and selectivity of catalyst?
5)
Describe some feature of catalysis by Zeolites.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write the mechanism of acid catalysed dehydration of ethanol to give ethene.
2)
Write Kolbe’s reaction.
3)
Write the structure of the aldehyde, carboxylic acid and ester that yield 4- methylpent -2-en-1-ol.
4)
How are the following conversions effected
i) benzylchloride to benzylalcohol
ii) benzyalalcohol to benzoic acid
5)
Compound (A) C₆H₁₂O₂ on reduction with LiAlH₄ yields two compounds B and C. The compound (B) on oxidation gave (D) which on treatment with aqueous alkali and subsequent heating furnished E. The latter on catalytic hydrogenation gave (C). Compound (D) on oxidation gave monobasic acid (molecular formula weight = 60). Deduce the structure of (A), (B), (C), (D) and (E).

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How is phenol prepared from
i) chloro benzene
ii) isopropyl benzene
2)
Write the chemical equation for Williamson synthesis of 2-ethoxy – 2- methyl pentane starting from ethanol and 2 – methyl pentan -2-ol.
3)
What is metamerism? Give the structure and IUPAC name of metamers of 2-methoxy propane
4)
When tertiary butyl alcohol and 1-butanol are separately treated with a few drops of KMnO₄, in one case only the purple colour disappears and a brown precipitate is formed. Which of the two alcohols gives the above reaction and what is that brown precipitate?
5)
Give the Grignard reagent and carbonyl compound that can be used to prepare.
(a) CH₃-CH₂-CH₂-OH
(b) (CH₃)₂C(OH)CH₂CH₂CH₃
(c) C₆H₅CH₂CH(OH)CH₃

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Identify A, B, C and D
\(\text { ethanoic acid } \stackrel{\mathrm{SOCl}_{2}}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Pd} / \mathrm{BaSO}_{4}}{\longrightarrow} \mathrm{B} \stackrel{\mathrm{NaOH}}{\longrightarrow} \mathrm{C} \stackrel {\longrightarrow}{\triangle} \mathrm{D}\)
2)
An alkene (A) on ozonolysis gives propanone and aldehyde (B). When (B) is oxidised (C) is obtained. (C) is treated with Br₂/P gives (D) which on hydrolysis gives (E). When propanone is treated with HCN followed by hydrolysis gives (E). Identify A, B, C, D and E.
3)
How will you convert benzaldehyde into the following compounds?
(i) benzophenone
(ii) benzoic acid
(iii) α-hydroxyphenylaceticacid.
4)
What is the action of HCN on
(i) propanone
(ii) 2,4-dichlorobenzaldehyde
iii) ethanal
5)
A carbonyl compound A having molecular formula C₅H₁₀O forms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How will you distinguish between primary secondary and tertiary alphatic amines.
2)
Account for the following
i. Aniline does not undergo Friedel – Crafts reaction
ii. Diazonium salts of aromatic amines are more stable than those of aliphatic amines
iii. pK_b of aniline is more than that of methylamine
iv. Gabriel phthalimide synthesis is preferred for synthesising primary amines.
v. Ethylamine is soluble in water whereas aniline is not
vi. Amines are more basic than amides
vii.Although amino group is o – and p – directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m – nitroaniline.
3)
Arrange the following
i. In increasing order of solubility in water, C₆H₅ NH₂, (C₂H₅)₂NH, C₂H₅NH₂
ii. In increasing order of basic strength
a) aniline, p- toludine and p – nitroaniline
b) C₆H₅ NH₂, C₆H₅ NHCH₃, C₆H₅NH₂, p-Cl-C₆- H₄-NH₂
iii. In decreasing order of basic strength in gas phase
(C₂H₅)NH₂, (C₂H₅)NH, (C₂H₅)₅N and NH₃
iv. In increasing order of boiling point
C₆H₅OH, (CH₃)₂NH, C₂H₅NH₂
v. In decreasing order of the pK_b values
C₂H₅NH₂, C₆H₅NHCH₃.(C₂H₅)₂ NH and CH₃NH₂
vi. Increasing order of basic strength
C₂H₅NH₂,C₆H₅N(CH₃)₂, (C₂H₅)₂ NH and CH₃NH₂
vii. In decreasing order of basic strength
4)
How will you prepare propan – 1- amine from
i) butane nitrile
ii) propanamide
ii) 1- nitropropane
5)
Identify A,B,and C
CH₃- NO₂ \(\overset { { L }_{ 1 }{AlH }_{ 4 } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { 2CH_3 }{Ch_2Br } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { {H}_{ 2 }{SO}_{ 4 } }{ \underset { {} }{ \longrightarrow } } \) C

12th Standard English Medium Chemistry Subject Biomolecules Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give two difference between Hormones and vitamins.
2)
Write a note on denaturation of proteins.
3)
Why carbohydrates are generally optically active.
4)
How are vitamins classified?
5)
What are harmones? Give examples

12th Standard English Medium Chemistry Subject Biomolecules Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Write a note on denaturation of proteins.
2)
What are reducing and non – reducing sugars?
3)
Why carbohydrates are generally optically active.
4)
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
i) Starch
ii) fructose
iii) sucrose
iv) lactose
iv) maltose
5)
How are vitamins classified?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 3 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are drugs? How are they classified.
2)
How the tranquilizers work in body.
3)
Write the structural formula of aspirin.
4)
Explain the mechanism of cleansing action of soaps and detergents.
5)
Which sweetening agent are used to prepare sweets for a diabetic patient?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 3 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Who do soaps not work in hard water?
2)
What are drugs? How are they classified.
3)
How the tranquilizers work in body.
4)
Write the structural formula of aspirin.
5)
Explain the mechanism of cleansing action of soaps and detergents.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Describe the role of the following in the process mentioned.
(i) Silica in the extraction of copper.
(ii) Cryolite in the extraction of aluminium.
(iii) Iodine in the refining of Zirconium.
(iv) Sodium cyanide in froth floatation.
2)
Explain the principle of electrolytic refining with an example.
3)
The selection of reducing agent depends on the thermodynamic factor: Explain with an example.
4)
Give the limitations of Ellingham diagram.
5)
Write a short note on electrochemical principles of metallurgy.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How will you identify borate radical?
2)
Write a note on zeolites.
3)
How will you convert boric acid to boron nitride?
4)
A hydride of 2nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). Identify A, B and C.
5)
CO is a reducing agent. Justify with an example.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give two equations to illustrate the chemical behaviour of phosphine.
2)
What happens when PCl₅ is heated?
3)
Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.
4)
Deduce the oxidation number of oxygen in hypofluorous acid – HOF.
5)
What type of hybridisation occur in
a) BrF₅
b) BrF₃

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Give two equations to illustrate the chemical behaviour of phosphine.
2)
Give a reaction between nitric acid and a basic oxide.
3)
Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.
4)
Deduce the oxidation number of oxygen in hypofluorous acid – HOF.
5)
Complete the following reactions.
\(1. \mathrm{NaCl}+\mathrm{MnO}_{2}+\mathrm{4H}_{2} \mathrm{SO}_{4} \longrightarrow \)
\(2. \mathrm{NaNO}_{2}+\mathrm{HCl} \longrightarrow \)
\(3.\mathrm{P}_{4}+\mathrm{3NaOH}+\mathrm{3H}_{2} \mathrm{O} \longrightarrow \)
\(4. \mathrm{AgNO}_{3}+\mathrm{PH}_{3} \longrightarrow \)
\(5. \mathrm{Mg}+\mathrm{10HNO}_{3} \longrightarrow \)
\(6. \mathrm{KClO}_{3} \stackrel{\Delta}{\longrightarrow} \)
\(7. \mathrm{Cu}+Con. \ Hot \ \mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow\)
\(8. \mathrm{Sb}+\mathrm{Cl}_2 \longrightarrow \)
\(9. \mathrm{HBr}+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \)
\(10. \mathrm{XeF}_6+\mathrm{H}_2 \mathrm{O} \longrightarrow \)
\(11. \mathrm{XeO}_6{ }^{4-}+\mathrm{Mn}^{2+}+\mathrm{H}^{+} \longrightarrow \)
\(12. \mathrm{XeOF}_4+\mathrm{SiO}_2 \longrightarrow \)
\(13. \mathrm{Xe}+\mathrm{F}_2 \frac{\mathrm{Ni} / 200 \mathrm{~atm}}{400^{\circ} \mathrm{C}}\).

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Out of Lu(OH)₃ and La(OH)₃ which is more basic and why?
2)
Why do zirconium and Hafnium exhibit similar properties?
3)
The E⁰_M²⁺/M value for copper is positive. Suggest a possible reason for this.
4)
Describe the variable oxidation state of 3d series elements.
5)
Why first ionization enthalpy of chromium is lower than that of zinc?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Why europium (II) is more stable than Cerium (II)?
2)
Which is stronger reducing agent Cr²⁺ or Fe²⁺?
3)
Predict which of the following will be coloured in aqueous solution Ti²⁺, V³⁺, Sc⁴⁺, Cu⁺, Sc³⁺, Fe³⁺, Ni²⁺ and Co³⁺
4)
Which metal in the 3d series exhibits +1 oxidation state most frequently and why?
5)
Transition metals show high melting points. Why?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What are hydrate isomers? Explain with an example.
2)
What is crystal field stabilization energy (CFSE)?
3)
Discuss briefly the nature of bonding in metal carbonyls.
4)
On the basis of VB theory explain the nature of bonding in [Co(C₂O₄)₃]^3-
5)
Write the oxidation state, coordination number , nature of ligand, magnetic property and electronic configuration in octahedral crystal field for the complex K₄[Mn(CN)₆]

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
Explain optical isomerism in coordination compounds with an example.
2)
What is crystal field splitting energy?
3)
A solution of [Ni(H₂O)₆]²⁺ is green, whereas a solution of [Ni(CN)₄]^2- is colorless -Explain
4)
What is the coordination entity formed when excess of liquid ammonia is added to an aqueous solution of copper sulphate?
5)
What are the limitations of VB theory?

12th Standard English Medium Chemistry Subject Solid State Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
What is meant by the term “coordination number”? What is the coordination number of atoms in a bcc structure?
2)
Aluminium crystallizes in a cubic close packed structure. Its metallic radius is 125pm. calculate the edge length of unit cell.
3)
KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K⁺ and F⁻ in KF. (given : density of KF is 248 g cm^-3)
4)
Atoms X and Y form bcc crystalline structure. Atom X is present at the corners of the cube and Y is at the centre of the cube. What is the formula of the compound?
5)
Write a note on Frenkel defect.

12th Standard English Medium Chemistry Subject Solid State Book Back 5 Mark Questions with Solution Part - II updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
An element has bcc structure with a cell edge of 288 pm. The density of the element is 7.2 g cm^-3. How many atoms are present in 208 g of the element.
2)
If NaCl is doped with 10^-2 mol percentage of strontium chloride, what is the concentration of cation vacancy?
3)
KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K⁺ and F⁻ in KF. (given : density of KF is 248 g cm^-3)
4)
An atom crystallizes in fcc crystal lattice and has a density of 10 gcm⁻³ with unit cell edge length of 100pm. Calculate the number of atoms present in 1 g of crystal.
5)
Sodium metal crystallizes in bcc structure with the edge length of the unit cell 4.3 x 10^-8cm. Calculate the radius of sodium atom.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 5 Mark Questions with Solution Part - I updated Book back Questions - by Question Bank Software - May 13, 2022 - View & Read

1)
How do nature of the reactant influence rate of reaction.
2)
The half life of the homogeneous gaseous reaction SO₂Cl₂→ SO₂ + Cl₂ which obeys first order kinetics is 8.0 minutes. How long will it take for the concentration of SO₂Cl₂ to be reduced to 1% of the initial value?
3)
A zero order reaction is 20% complete in 20 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?
4)
A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?
5)
Rate constant k of a reaction varies with temperature T according to the following Arrhenius equation \(\log K=\log A-\frac { { E }_{ a } }{ 2.303R } \left( \frac { 1 }{ T } \right) \)Where E_a is the activation energy. When a graph is plotted for log k Vs \(\frac{1}{T}\) a straight line with a slope of -4000K is obtained. Calculate the activation energy.

12th Standard English Medium Chemistry Subject Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
An element with molar mass 2.7 x 10^-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 10³ kg m^-3, What is the nature of the cubic unit cell?
2)
A first order reaction completes 25% of the reaction in 100 mins. What are the rate constant and half life values of the reaction?
3)
Derive Henderson - Hasselbalch equation
4)
Derive a relationship between dissociation constant K_a and molar conductivity \({ \Lambda }_{ m }\)
5)
Explain the various chemical methods by which colloids can be prepared.

12th Standard English Medium Chemistry Subject Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
In the extraction of copper, explain the smelting process.
2)
How are silicates classified? Give an example for each type of silicate.
3)
Mention the uses of helium.
4)
Why is there a variation of atomic and ionic size as we move from Sc to Zn?
5)
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
(i) K[Cr(H₂O)₂(C₂O₄)₂]
(ii) [Co(en)₃]CI₃
(iii) [Co(NH₃)₅(NO₂)](NO₃)₂
(iv) [Pt (NH₃)(H₂O)CI₂]

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
State Bragg's law.
2)
What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?
3)
What is Henderson equation?
4)
What is salt bridge? How is it represented in a cell diagram?
5)
Wha tare catalyticpoisons? Give an example.

12th Standard English Medium Chemistry Subject Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Before reduction, the ore is first converted into the oxide of metal of interest. Give reason
2)
How is aluminum chloride prepared from aluminum?
3)
Why do noble gases form compounds with fluorine and oxygen only?
4)
What are the general properties of f-block elements? (Lanthanides and Actinides)
(i) Electronic configuration
(ii) Oxidation state
(iii) Radii of tripositive ions.
5)
Aqueous copper sulphate solution (blue) gives
(i) a green precipitate with aqueous potassium fluoride.
(ii) a bright green solution with aqueous potassium chloride. Explain these experimental results.

12th Standard English Medium Chemistry Subject Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What are anionic & cationic complex? Give an example.
2)
What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?
3)
Explain how will you find activation energy of a reaction by graphical method.
4)
Give an example of secondary cell.
5)
Why colloidal system in gas in gas does not exist?

12th Standard English Medium Chemistry Subject Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is meant by concentration?
2)
Mention the physical properties of boranes.
3)
Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?
4)
Why lanthanoids are called f block elements?
5)
Write the IUPAC name of the complex.

12th Standard English Medium Chemistry Subject Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
A crystal which has the same unit cell and contains the same lattice points throughout the crystal is_________.
2)
In the acid hydrolysis of an ester, what is the time taken for complete hydrolysis?
3)
pH of a solution can be kept constant with the help of __________ solution.
4)
SHE is _______.
5)
Argyrol is_______.

12th Standard English Medium Chemistry Subject Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Among the following, one does not belong to calcination, Pick the odd one out.
2)
S-S bond is present in _______.
3)
Which of the following is coloured due to charge transfer?
4)
The spin only magnetic moment of [Mnfsr₄]^2- is 5.9 BM. Geometry of the complex ion is _______.
5)
Which of the following is characteristic of ionic solids?

12th Standard English Medium Chemistry Subject Metallurgy Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain froth flotation, with diagram.
2)
In the extraction of copper, explain the smelting process.
3)
Explain refining of titanium by Van-Arkel method.
4)
List the applications of iron.
5)
What is zone refining? Describe the principle involved in the purification of the metal by this method.

12th Standard English Medium Chemistry Subject Metallurgy Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain concentration by magnetic separation with diagram.
2)
Explain refining of nickel by mond's process
3)
List out the application of aluminum.
4)
How can you separate alumina from silica in a bauxite ore.
5)
Write short note on the following:
(i) The process in which no external reducing agent is used.
(ii) The process which is used for highly electro positive metal.
(iii) Write the equation involved in the thermite process.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What are the properties of inter halogen compounds?
2)
(i) \(\mathrm{PCl}_{5}+\mathrm{Ag} \longrightarrow \text { ? } \)
(ii) \(\mathrm{AgCl}_{(s)}+\mathrm{NH}_{3(\mathrm{aq})} \longrightarrow ? \)
(iii) \(\mathrm{PCl}_{3} \stackrel{\text { Moist air }}{\longrightarrow} \text { ? } \)
(iv) \(\mathrm{PCl}_{5} \stackrel{\text { Moist air }}{\longrightarrow} ? \)
(v) \(\mathrm{NaH}_{2} \mathrm{PO}_{2}+\mathrm{HCl} \longrightarrow ?\)
3)
An element A occupies group number 15 and period number 3, exhibits allotropy and it is tetra atomic. A reacts with caustic soda to give B which is having rotten fish odour. A reacts with chlorine to give C which has a pungent odour Identify A, B and C. Write the reactions.
4)
An element 'A' occupies group number 15 and period number 3. It reacts with chlorine to give B which further reacts with chlorine to give C at 273K. Both B and C are chlorinating agents for organic compounds. C is a better chlorinating agent because it chlorinates metals also. Breasts with SO₃ and reduces it to SO₂ B has a pyramidal shape. C has trigonal bipyramidal shape by sp³d hybridisation. Identify the element A and the compounds B and C. Write the reactions.
5)
An element A occupies group number 15 and period number 3, reacts with chlorine to give compound B. The compound B on hydrolysis gives a dibasic acid C. The compound C on heating undergoes auto oxidation and reduction to give a tribasic acid D. Identify the elements A compounds B, C and D. Write the reactions.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain the oxidising and reducing property of SO₂·
2)
Explain the oxidising property of sulphuric acid.
3)
How does sulphuric acid react with metals at various conditions.
4)
How is chlorine manufactured by the electrolysis of brine.
5)
Explain the bleaching action of Chlorine.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Justify the following statement.
"Elements of the first transition series possess many properties different from those of heavier transition elements".
2)
Why is there a variation of atomic and ionic size as we move from Sc to Zn?
3)
Write a note on the ionization enthalpy of transition elements.
4)
Write a short note on the oxidation states of 3d series elements.
5)
How are materials classified based on their magnetic properties?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers.
(i) K[Cr(H₂O)₂(C₂O₄)₂]
(ii) [Co(en)₃]CI₃
(iii) [Co(NH₃)₅(NO₂)](NO₃)₂
(iv) [Pt (NH₃)(H₂O)CI₂]
2)
What is meant by stability of a co-ordination compound in solution? State the factors which govern stability of complexes.
3)
What are the main assumptions of Valence Bond Theory? Explain.
4)
How are metal carbonyls classified depending on the number of metal atoms?
5)
Give the IUPAC name for the following compounds.
(i) [Ag(NH₃)₂]CI
(ii) K₃[Fe(CN)₅NO]
(ill) [Cr(PPh₃)(CO)₃]
(iv) [Ag(NH₃)₂]⁺
(v) [FeF₆]^4-

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
For the complex [NiCI₄]^2- write (i) the IUPAC name (ii) The hybridisation type (iii) The shape of the complex
2)
How are Co-ordination compounds classified?
3)
What are the salient feature of crystal field theory?
4)
How are metal carbonyls classified based on the structure?
5)
Give the structure for the following compounds.
(i) pentaamminechlorocobalt (III) ion
(ii) Triamminetrinitrito- k N cobalt (III)
(ill) tetraammineaquabromidooobalt(III)nitrate
(iv) Dichloridobisethane-(1,2-diamine) cobalt (lIl) chloride
(v) Tetraamminecopper (lI) sulphate

12th Standard English Medium Chemistry Subject Solid State Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Ionic solids, which have anionic vacancies due to metal excess defect, develop colour. Explain with the help of a suitable example.
2)
What are the general characteristics of solids?
3)
An element with molar mass 2.7 x 10^-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 10³ kg m^-3, What is the nature of the cubic unit cell?
4)
Explain the following: Similarities and differences between metallic and ionic crystals.
5)
What are stoichiometric defects in ionic solids? Explain

12th Standard English Medium Chemistry Subject Solid State Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
A cubic solid is made of two elements P and Q. Atoms of Q are at the corners of the cube and P at the body - centre. What is the formula of the compound? What is the coordination numbers of P and Q?
2)
What are molecular solids? Explain the types of molecular solids.
3)
How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain.
4)
How are crystals classified?
5)
Write note on impurity defect?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
For the reaction 2A + B ⟶ A₂B. The rate = k [A] [B]² with k = 2.0 x 10^-6 mol? L²S^-1. Calculate the initial rate of the reaction, when [A] = 0.1 mol L^-1, [B] = 0.2 mol L^-1. Calculate the rate of reaction after [A] is reduced to 0.06 mol L^-1
2)
In a pseudo first order hydrolysis of ester in water, the following results were obtained.

1 0 30 60 90

[Ester]mol L^-1 0.55 0.31 0.17 0.085

(i) Calculate the average rate of reaction between the time interval 30 to 60 seconds.
(i) Calculate the pseudo first order rate constant for the hydrolysis of ester.
3)
Write an account of the Arrhenius equation for rates of chemical reactions.
4)
For the reaction R - P, the concentration of a reactant changes from 0.03 M to 0.02 M in 25 minutes. Calculate the average rate of reaction using units of time both in minutes and second.
5)
A first order reaction laws on rate constant 1.15 x 10^-3 S^-1. How long will 5 g of this reactant take to reduce to 3g?

1	0	30	60	90
[Ester]mol L^-1	0.55	0.31	0.17	0.085

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
A first order reaction laws on rate constant 1.15 x 10^-3 S^-1. How long will 5 g of this reactant take to reduce to 3g?
2)
Reaction is first order in A and second in B.
(i) Write the different rate equation.
(ii) How is the rate affected on increasing the concentration of B three times?
(iii) How is the rate affected when the concentrations of both A and B are doubled?
3)
Rate constant of a first order reaction is 0.45 sec^-1, calculate its half life.
4)
If 30% of a first order reaction is completed in 12 mins, what percentage will be completed in 65.33 mins?
5)
The half life period of first order reactions is 10 mins. What percentage of the reactant will remain after one hour?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Calculate the pH of 0.02 m Ba(OH)₂ aqueous solution assuming Ba(OH)₂ as a strong electrolyte.
2)
Calculate the pH of 0.001 M HCI solution.
3)
If a solution has a pH of 7.41, determine its H⁺ concentration.
4)
The degree of dissociation of acetic acid in 0.1 M solution is 0.04. Calculate K_a for acetic acid. Where a is the degree of dissociation, C is the concentration of the acid in moles/ lit.
5)
A 0.02 M solution of a weak mono basic acid is 5% ionised. Calculate the ionisation constant of the acid.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
A buffer solution containing 0.1 mole of ammonium hydroxide and 0.15 mole of ammonium chloride per litre of the solution. Calculate the pH of the buffer solution. K_b for ammonium hydroxide is 1.8 x 10^-5.
2)
Calculate the pH of 0.1 M NH₄OH if Kb = 1.75 x 10^-5
3)
Explain buffer action in an acidic buffer.
4)
On hydrolysis of salts of strong acid and strong base, the solution obtained is neutral. Justify your answer with a suitable example
5)
Derive the hydrolysis constant for the hydrolysis of salt of strong base and weak acid. Deduce its pH.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Calculate the emf of the cell Zn/ZnO₂, OH^-, HgO/Hg given that E^o values of OH^-, ZnO and OH^-, HgO/Hg half cells are -1.216 V and 0.098 V respectively.
2)
Calculate the emf of the cell having the cell reaction 2Ag⁺ + Zn ⇌ 2Ag + Zn²⁺ and E^o_cell= 1.56 V at 25°C when concentration of Zn²⁺ = 0.1 M and Ag⁺ = 10 M in the solution.
\([{ E }_{ cell }={ E }_{ cell }^{ o }-\frac { RT }{ nF } In\frac { [{ Zn }^{ 2+ }] }{ [{ Ag] }^{ 2 } } ]\)
3)
How will you determine the conductivity of an electrolytic solution using a wheatstone, bridge?
4)
Explain SHE as a reference electrode.
5)
Write the electrochemical mechanism of corrosion.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
The standard reduction potential for the reaction Sn⁴⁺ + 2e^- ⟶ Sn²⁺ is + 0.15v. Calcuate the free energy change of the reaction.
2)
The emf of the cell Cd/CdCl₂, 25H₂O / AgCI_(s)Ag E^o is 0.675 V. Calculate of the cell reaction.
3)
The emf of the half cell Cu²⁺_(aq)/ Cu_(s). containing 0.01 M Cu²⁺solution is + 0.301V. Calculate the standard emf of the half cell
4)
Calculate the standard emf of the cell having the standard free energy change of the cell reaction is -64.84 kJ for 2 electrons transfer.
5)
The equilibrium constant of cell reaction: Ag_(s)+ Fe³⁺ ⇌ Fe²⁺+ Ag⁺ is 0.335 at 25°C. Calculate the standard emf of the cell AgI Ag⁺; Fe³⁺, Fe²⁺/Pt. Calculate E^o of the half cell Fe³⁺, Fe²⁺/Pt is 0.7791 V. Calculate E^o of Fe³⁺, Fe²⁺/ Pt half cell.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write the characteristics of catalysts.
2)
Write a note on phase transfer catalysis.
3)
Explain the various chemical methods by which colloids can be prepared.
4)
Explain the electrical property of colloids with a neat diagram. (or) Write a note on Helmholta electrical double layer.
5)
Write any five applications of colloids in day - to day life.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write the characteristics of adsorption.
2)
Write a note on Freundlich adsorption isotherm.
3)
Give the special characteristics of enzyme catalysed reactions.
4)
Explain the following
(i) Reactant selectivity
(ii) Transition state selectivity
(iii) Product selectivity
5)
Explain electrodialysis

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
An organic compound (A) C₂H₆O liberates hydrogen on treatment with metallic sodium. (A) on mild oxidation gives (B) C₂H₄O which answers iodoform test. (B) when treated with cone. H₂SO₄undergoes polymerisation to give (C) a cyclic compound. Identify (A) (B) and (C) and explain the reactions.
2)
An organic compound A of molecular formula C₃H₆O on reduction with LiAlH₄ gives B. Compound B gives blue colour in Victor Meyer's test and also forms a chloride C with SOCl₂. The chloride on treatment with alcoholic KOH gives D. Identify A, B, C and D and explain the reactions.
3)
An organic compound (A) of molecular formula C₃H₈O₂ is obtained as by-product in the manufacture of soap. Compound (A) on heating with P₂O₅ gives an unsaturated compound (B) of molecular formula C₃H₄O. Compound (A) with well cooled mixture of Conc.H₂SO₄ and fuming HNO₃ form compound (C) which is an explosive. Identify A, B and C and explain the rection.
4)
An organic compound (A) C₆H₆O gives violet colour with neutral FeCl₃ solution. With NH₃ in the presence of anhydrous ZnCI₂, (A) gives (B) (C₆H₇N). (A) with dimethyl sulphate gives (C) (C₇H₈O). What are (A), (B) and (C)? Explain the reactions.
5)
An organic compound 'A' is a sodium salt of phenolic acid with molecular formula C₇H₅O₃Na. 'A' on heating with soda lime gives compound 'B' of molecular formula C₆H₆O. 'B' gives violet colour with neutral ferric chloride. 'B' on treatment with C₆H₅COCI in the presence of NaOH gives an ester 'C'. Identify 'A', 'B' and 'C'. Explain the reactions.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write all possible isomers with molecular formula C₄H₁₀O and name them.
2)
Give short notes on the following: (a) Kolbe's reaction, (b) Riemer - Tiemann reaction
3)
How would you distinguish between (i) methyl alcohol and ethyl alcohol (ii) benzyl alcohol and phenol, (iii) ethyl alcohol and benzyl alcohol?
4)
What are ethers? Write note on simple and mixed ethers with examples.
5)
Compound (A) with molecular formula C₆H₆O gives violet colour with neutral ferric chloride. (A) reacting with CCI₄ and NaOH gives two isomers (B) and (C). (A) on oxidation with CrO₂Cl₂ gives (D) of molecular formula C₆H₄O₂. Identity A, B, C and D. Explain the reactions.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Compound (A) with molecular formula C₂H₄O reduces Tollen's reagent. (A) On treatment with HCN gives compound (B). Compound (B) on hydrolysis with an acid gives compound (C) with molecular formula C₃H₆O₃ which is an optically active compound. Compound (A) on reduction with N₂H/C₂H_sONa gives a hydrocarbon (D) of molecular formula C₂H₆. Identify (A), (B), (C) and (D) and explain the reactions.
2)
An organic compound (A) of molecular formula C₇H₆O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C₇H₆O₂ which gives brisk effervescence with NaHCO₃ solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.
3)
Ail organic compound. (A) C₇H₆O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.
4)
An organic compound Aofmolecular formula C₃H₆O answers iodoform test. Another organic compound B of molecular formula C₇H₆O is known as oil of bitter almonds. A reacts with B to form an unsaturated compound C of molecular formula C₁₀H₁₀O. Compound B reacts with malonic acid in the presence of pyridine to form an unsaturated acid D of molecular formula C₉H₅O₂ Identify A, B, C and D. Explain the reactions.
5)
Compound (A) with Molecular formula C₇H₆O does not reduce Fehling's solution. Compound (A) reacts with acetone in the presence of NaOH to give a compound (B) which is an α, β-unsaturated compound. Further (A) reacts with dimethyl aniline in the presence of cone, H₂SO₄ to give compound (C) which is a dye. Identify (A) (B) and (C). Explain the reactions.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
An organic compound (A) C₂H₃OCI on treatment with Pd and BaSO₄ gives (B) C₂H₄O which answers iodoform test. (B) when treated with cone.H₂SO₄ undergoes polymerisation to give (C) a cyclic compound. Identify (A), (B) and (C) and explain the reactions.
2)
An organic compound (A) with molecular formula C₃H₆O undergoes iodoform reaction. Two molecules of compound (A) react with dry HCI to give compound (B) (C₆H₁₀O). Compound (B) reacts with one more molecule of compound (A) to give compound (C) (C₉H₁₄O). Identify (A), (B) and (C). Explain the reactions.
3)
An organic compound A (C₂H₃N) on reduction with SnCI₂/HCI gives B (C₂H₄O) which reduces Tollen's reagent. Compound B on reduction with N₂H₄/C₂H₅ONa gives C (C₂H₆). Identify the compounds A, B and C. Explain the reactions involved.
4)
An organic compound (A) of molecular formula C₇H₆O is called as oil of bitter almonds. (A) on oxidation gives (B) of molecular formula C₇H₆O₂ which gives brisk effervescence with NaHCO₃ solution. When (A) is refluxed with aqueous alcoholic (KCN) compound (C) is formed. Identify A, B and C and write the equations.
5)
Ail organic compound. (A) C₇H₆O reduces Tollens reagent. Compound (A) reacts with acetic anhydride in the presence of anhydrous sodium acetate and gives an unsaturated acid (B). Compound (A) reacts with acetone in the presence of alkali and gives (C). What are (A)(B) and (C) Explain the reactions.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Account for the following:
i) (CH₃)₂ NH is stronger base than NH₃
ii) CH₃CH₂NH₂ is more basic than CH₃CONH₂
iii) Aniline is less basic than Ethyl amine
iv) On sulphonation of aniline, p-amino benzene sulphonic acid is formed.
2)
Account for
i) Reduction of CH₃CH gives CH₃CH₂NH₂while CH₃NC gives (CH₃)₂NH.
ii) (CH₃)₂NH requires two molar proportion of CH₃I to give the same crystalline product formed by (CH₃)₂N with one mole of CH₃l.
iii) Nitration of aniline with conc.HNO₃ may end up with same meta nitro product.
iv) p-toluidine is a stronger base than p-nitroaniline.
3)
How can the following coversion be effected?
i) Nitrobenzene ⇾ Nitrosobenzene
ii) Nitrobenzene ⇾ Azoxybenzene
iii) Nitrobenzene ⇾ Hydrazobenzene
4)
How do primary, secondary and tertiary amines react with nitrous acid?
5)
Outline the mechanism of
(a) Nitration of aniline,
(b) Acetylation of aniline.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What happens when ethylamine is treated with
(i) CHCl₃/NaOH
(ii) CS₂
(iii) C₆H₅CHO.
2)
Account for the following:
(i) Nitroethane is soluble NaOH
(ii) Nitroethane reacts with nitrous acid
(iii) 2-methyl-2-nitro propane has neither of the properties.
3)
Write the differences between nitro methane and nitro benzene.
4)
Write a note on
(i) Carbylamine reaction
(ii) Mustard oil reaction
(iii) Acetylation of benzylamine
(iv) Formation of Schiff's base
(v) Diazotisation reaction
5)
CuSO₄on mixing with NH₃ (1:4 ratio) does not give test for Cu²⁺ ions but gives test for SO₄^2- ions. Why?

12th Standard English Medium Chemistry Subject Biomolecules Creative 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Elucidate the structure of glucose.
2)
Define the following terms as related to proteins
(i) Primary structure
(ii) Secondary structure
(iii) β strands
3)
List the importance of proteins in biological processes.
4)
Explain the classification of hormones.
5)
Distinguish glucose from fructose.

12th Standard English Medium Chemistry Subject Biomolecules Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Give the uses of carbohydrates.
2)
Elucidate the structure of fructose.
3)
List the importance of proteins in biological processes.
4)
Outline the classification of carbohydrates giving example for each.
5)
Show the formation of a peptide bond with an equation.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write a note on drug target interaction.
2)
Explain Receptor as drug targets.
3)
Explain the classification of polymers based on their structure and mode of synthesis.
4)
Styrene polymerises to polystyrene when heated in the presence of peroxide initiator.
(i) What is the mechanism involved?
(ii) Give the initiation step for the above process.
(iii) How does the chain propogate in the above mechanism?
(iv) How is the above chain reaction terminated?
5)
Explain the prepareation of Bakelite and Give its use.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Give the structure of melamine formaldehyde resin.
2)
How is Nylon - 6,6 prepared? Give it use.
3)
Write the preparation of neoprene and give its use.
4)
Identify the polymer and write the reaction involved.
(i) Buta-1,3-diene and styrene in the presence of sodium.
(ii) 3 - hydroxy butanoic acid and 3-hydroxy pentanoic acid.
5)
Identify the monomers of the following polymers.

(ii) (NH(CH₂)₆ NHCO (CH₂)₄ CO)n
(iii) \({ CH }_{ 2 }-\underset { \overset { | }{ Cl } }{ C } =CH-{ CH }_{ 2 })_{ n }\)

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
How is Low density polyethene prepared?
2)
The monomer is capro lactam Identify the polymer when the monomer is heated at 533K.
3)
Give the condensation reaction between urea and formaldehyde. Identify the polymer.
4)
How is Buna - N prepared? Give its use.
5)
Give examples for
(i) addition polymer,
(ii) Synthetic rubbers,
(iii) Condensation polymers,
(iv) formaldehyde resins.

12th Standard English Medium Chemistry Subject Biomolecules Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Amino acids are amphoteric in nature. Explain.
2)
How do enzymes help a substrate to be attacked by the reagent effectively?
3)
Give the structure of sucrose.
4)
Write the monomers of the following sugars and explain how they are linked.
(i) Sucrose
(ii) Maltose
(iii) Lactose
5)
Name the two components starch is made up of. How do they differ from each other.

12th Standard English Medium Chemistry Subject Biomolecules Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Draw the structure of α -D fructose furanose and β - D fructose furanose.
2)
Why sucrose is called invert sugar?
3)
ExpIain the classification of proteins based on their structure.
4)
What are carbohydrates? Give two examples.
5)
Write a note on tertiary structure of proteins.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
An Organic compound (A) with molecular formula C₆H₇N gives (B) with HNO₂ / HCI at 273 K. The aqueous solution of (B) on heating gives compound (C) which gives violet colour with netural FeCI₃. Identify the compounds (A), (B) and (C) and write the equations.
2)
Outline the preparation of (a) para nitroaniline from aniline, (b) tri bromo benzene from tribromo aniline
3)
Aniline reacts with Br₂/H₂O to give a tribromo derivative. How would you convert aniline to get a monobromo derivate?
4)
Convert aniline to p-nitro aniline
5)
Starting from the following reagents, how will your prepare ethanenitrile.
i) CH₃Br
ii) CH₃CONH₂
iii) CH₃CH=NOH

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain Levine and hauser acetylation.
2)
How can the following conversion be effected?
i) Nitrobenzene to anisole
ii) Chloro benzene to phenyl hydrazine
iii) Aniline to benzoic acid
iv) Benzene diazonium chloride to ehtyl benzene.
3)
How are the following compounds obtained from benzene diazonium chloride?
(i) phenol
(ii) ester
(iii) p-hydroxy azo benzene
4)
Write a note on structure of amine.
5)
An organic compound 'A' on reduction gives compound 'B' which on reaction with trichloromethane and caustic potash forms 'C'. Compound 'C' on catalytic reduction given N-methyl benzenamine. Identify A, B and C and write the reactions involved.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
How will you convert benzaldehyde to
(I) C₆H₅COOH
(ii) C₆H_sCH₂OH
(iii) C₆HSCH₃
2)
What is Malachite green dye? Explain its preparation?
3)
Formic acid reduces Tollen's reagent but acetic acid does not - Give reasons.
4)
Write the structure of 'A' and 'B' in the following reaction
\({ C }_{ 6 }{ H }_{ 5 }MgBr+{ CO }_{ 2 }\overset { (i)CO_{ 2 } }{ \underset { (ii){ H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow } } A\overset { { Br }_{ 2 } }{ \underset { FeBr_{ 3 } }{ \longrightarrow } } B\)
5)
Give the IUPAC names for the following:
(i) Crotonaldehyde
(ii) Methyl n-propyl ketone
(iii) Phenyl acetaldehyde.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain Stephen's reaction.
2)
Formaldehyde and benzaldehyde give Cannizaro reaction but acetaldehyde does not - account for this.
3)
How is carboxylic acid prepared from alcohols?
4)
Write a note on
(i) Perkin's reaction, and
(ii) Knoevenagal reaction.
5)
What happens when the following compounds are treated with dilute NaOH solution in cold?
(i) propanal
(ii) (CH₃)₃C-CHO

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
How will you prepare phenol (i) From chloro benzene (ii) From benzene sulphonic acid?
2)
How is nitroglycerine prepared from glycerol?
3)
How do ethers react with HI? Give the significances of the reaction.
4)
Account for the following:
(I) Phenol does not get protonated readily.
(ii) Phenol, benzene diazonium chloride, NaOH solution gives red dye.
5)
Halo alkane are easily prepared from alcohols while alkyl halides cannot be prepared from phenol. Justify.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Why is that tertiary alcohols show greater reactivity towards hydrogen halides than secondary and primary alcohols?
2)
How is glycerol obtained commercially? State its uses.
3)
Give a brief account of the following reaction: Etherification.
4)
Identify the isomerism in each of the following pairs.
CH₃OCH₂OCH₃ and CH₃OCH₂CH₂OH
CH₃CH(OH)CH₂OH and CH₂OHCH₂CH₂OH
\({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-OH\) and CH₃-CH₂-CH₂-CH₂OH
5)
Give the IUPAC names of each of the following and classify them as 1°, 2° and 3°
(a) CH₃(CH₂)₃CHOHCH(CH₃)₂
(b) (CH₃)₃C-CH₂OH
(c) \(({ CH }_{ 3 })_{ 2 }\underset { \overset { | }{ { C }_{ 6 }{ H }_{ 5 } } }{ C } -OH\)
(d) \(BrCH_{ 2 }-\underset { \overset { | }{ OH } }{ { CH }_{ 2 } } -CH-C({ CH }_{ 3 })_{ 3 }\)
(e) CH₂=CH-CHOHCH
(f) PhCH₂OH
(g) HOCH₂CH₂CH₂CH₂C₆H₅
(h) (C₂H₅)₃COH

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Define Gold number.
2)
Name various techniques by which a colloid can be deemulsified.
3)
Name two industrial process where heterogeneous catalysts are used.
4)
Define adsorption.
5)
For the coagulation of 100 ml of arsenious sulphide sol, 5 ml of 1 M NaCI is required. What is the flocculation value of NaCl?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write a note on auto catalysis?
2)
What are the important concepts of catalysis that adsorption theory explains?
3)
Give an example for a reaction catalysed by nano particles
4)
How are colloidal solution of ink and graphite prepared?
5)
What are the advantages of Brownian movement?

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
The standard reduction potential of Fe³⁺, Fe²⁺/ Pt is +0.771 V. This half cell is connected with another half cell such that emf of the cell is 0.771V. What is the other half cell?
2)
Write the overall redox reaction for the zinc-copper cell. Show the oxidation and reduction half reaction.
3)
Show that SHE can act both as a anode as well as cathode.
4)
Derive the relation between EMF and free energy.
5)
Draw a neat diagram of Leclanche cell and mark the parts.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Why does the emf of Leclanche cell decrease?
2)
Explain the reactions taking place in the anode and cathode of a lead storage battery.
3)
Corrosion of aluminum takes place at a much slower rate than iron. Give reason
4)
State Ohms law.
5)
The standard reduction potential of Fe³⁺, Fe²⁺/ Pt is +0.771 V. This half cell is connected with another half cell such that emf of the cell is 0.771V. What is the other half cell?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
The activation energy of the reaction 2HI_(g) ⟶ H_2(g) +I_2(g)is 209.5 KJ mol^-1 at 581 K. Calculate the fraction of molecules of reactants having energy equal to or greater than activation energy.
2)
The decomposition of NH₃ on platinum surface is zero order reaction what are the rates of production of N₂and H₂ if k = 2.5 x10^-4mol + L S^-1.
3)
What is the effect of temperature on the rate constant of a reaction? How can this temperature effect on rate constant be represented quantitatively?
4)
Calculate the half-life of a first order reaction from their rate constants given below.
(i) 200 S^-1
(ii) 2 min^-1
(iii) 4 years^-1
5)
Write the differences between rate and rate constant of a reaction.

12th Standard English Medium Chemistry Subject Solid State Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Silver crystallizes in fcc lattice. If edge length of the cell is 4.07 x 10^-8 em and density is 10.5 g cm^-3. Calculate the atomic mass of silver
2)
Why are solids incompressible?
3)
What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3^rdof tetrahedral voids?
4)
Inspite of long range order in the arrangement of particles, why are the crystals usually not perfect?
5)
ZnO turns yellow on heating. Why?

12th Standard English Medium Chemistry Subject Solid State Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write a note on the assignment of atoms per unit cell in fcc.
2)
State Bragg's law.
3)
Write the properties of ionic crystals.
4)
Answer the following:
(I) Name the intermolecular force present in ice.
(II) What type of bond is present in network solid?
5)
Distinguish the following. Crystal lattice and unit cell.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Draw the structures of geometrical isomers of [Fe(NH₃)₂ (CN)₄]^-
2)
What are the limitations of VBT?
3)
What is \(\pi \) back bonding?
4)
What is the significance of stability constants?
5)
Draw and explain the structure of Cisplatin.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What do you mean by auto ionisation of water?
2)
Define buffer Index
3)
How will you calculate solubility product from molar solubility?
4)
What is Henderson equation?
5)
What do you mean by buffer action?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
The rate constant k for the first order gas phase decomposition of ethyl iodide, C₂H₅I ⟶ C₂H₄ + HI is 1.60 x 10^-5 s^-1 at 600k and 6.36 x 10^-3 s^-1 at 700K. Calculate the energy of activation for this reaction.
2)
From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.
(i) 3NO_(g)⟶ N₂O_(g) Rate = K[NO]²
(ii) H₂O₂_(aq) + 3I^-_(aq) +2H⁺ ⟶ 2H₂O_(l) +I₃^- Rate = K[H₂O₂][I^-]
(iii) CH₃CHO_(g) ⟶ CH₄_(g) + CO_(g) Rate = K[CH₃ CHO]^3/2
(iv) C₂H₅Cl_(g) ⟶ C₂H_2(g) + HCl_(g) Rate = K[C₂H₅Cl]²
3)
A reaction is second order with respect to a reactant. How is the rate of reaction affected if the concentration of the reactant is
(i) doubled (ii) reduced to half
4)
A reaction is first order in A and second order in B.
(i) Write the differential rate equation.
(ii) How is rate affected on increasing the concentration of B three times?
(iii) How is the rate affected when the concentrations of both A and B are doubled?
5)
The rate constant for a first order reaction is 60 S^-1. How much time will it take to reduce the initial concentration of the reactant to its \({ \frac { 1 }{ 16 } }^{ th }\) value?

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain optical isomerism.
2)
Explain Bonding is metal carbonyls.
3)
What is stability constant?
4)
Name some metal complexes, that are present in our biological system and their role in it.
5)
Mohr's salt answers the presence of Fe²⁺, NH⁴⁺and SO₄^2- ions, whereas the potassium ferrithiocyanate will not answer Fe³⁺ and SCN ions give reason.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What are the uses of potassium dichromate?
2)
What happens to potassium permanganate on chemical oxidation?
3)
Explain the oxidising property of KMnO₄ in alkaline medium.
4)
What are the causes of lanthanoids contraction?
5)
Which is the last element in the series of the actinoids? Write the electronic configuration of this element comment on the possible oxidation state of this element.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write the properties of interstitial compound.
2)
What is chromyl chloride test? Give equations.
3)
Explain the preparation of potassium permanganate from pyrolusite.
4)
Give the ionic reaction of electrolytic of aqueous solution of KMnO₄
5)
Explain the oxidising property of KMnO₄ in natural medium. Give the equations.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain the reaction of ammonia with chlorine and chlorides at different conditions.
2)
Explain the commercial method of preparation of nitric acid.
3)
Give a test for sulphate?
4)
An element A occupies group number 17 and period number 2 is the most electronegative element. Element A reacts with another element B) which occupies group number 17 and period number 4 to give a compound Compound C undergoes sp³d² hybridisation and has octahedral structure. Identify the elements a and B and the compound C. Write the reactions.
5)
Discuss the anomalous nature of fluorine.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain the characteristic properties of hydrogen halides.
2)
Write the order of thermal stability of the hydrides of group 16 elements.
3)
Explain why the stability of oxoacids of chlorine increases in the order given below?
HCIO < HCIO₂ < HCIO₃ < HCIO₄
4)
CIF₃ molecule has aT-shaped structure and not a trigonal planar one. Why?
5)
Predict the product
(i) PCI₅+ C₂H₅OH \(\longrightarrow \)?
(ii) P₄+ SO₂Cl₂\(\longrightarrow \) ?
(iii) POCl₃ + H₂O \(\longrightarrow \) ?
(iv) HBr + PH₃\(\longrightarrow \) ? :,
(v) PCl₃+ H₂O\(\longrightarrow \) ?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Give the uses of boric acid?
2)
How is boron trifluoride obtained from boron trioxide?
3)
How is aluminum chloride prepared from aluminum?
4)
Give 3 uses of aluminium chloride
5)
Describe the structure of diamond.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
How is aluminium chloride prepared by McAfee process?
2)
Describe the structure of graphite.
3)
Describe the structure of fullerenes.
4)
Describe the structure of graphene.
5)
How is CO₂ manufactured?

12th Standard English Medium Chemistry Subject Metallurgy Creative 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is cyanide leaching? Give an example
2)
What is meant by ammonia leaching?
3)
How is acid leaching done for the sulphide ores?
4)
Explain roasting with an example.
5)
What is vapour phase method?

12th Standard English Medium Chemistry Subject Metallurgy Creative 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is coupling of reaction? How is it useful in metallurgy?
2)
How oxides of metals are reduced by hydrogen?
3)
What is auto-reduction?
4)
Mention the uses of copper.
5)
What is Misawite? Give its composition.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write a note on General anaesthetics?
2)
What are Antacids? Give three examples of antacid.
3)
What are food additives?
4)
What are sugar substituents? Give two examples.
5)
Define TFM.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Write a note on Orion?
2)
Give an example of bacteriocidal antobiotic.
3)
Name two narcotic which are used as analgesics.
4)
Saccharin is 550 times sweeter than sugar, yet used to prepare sweets for diabetic patient - Give reason.
5)
Why Iodoform and phenolic solutions are called antiseptic?

12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Name the two constituent of starch.
2)
What is renaturation?
3)
What do you mean by transcription?
4)
Give an example of an amino acid containing sulphur. Write its zwitter ion form.
5)
The sucrose that we eat in daily life is converted into glucose and fructose. Name the enzyme which facilitates this chemical reaction.

12th Standard English Medium Chemistry Subject Biomolecules Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Define nucleotide.
2)
The two strands in DNA are not identical but are complementary explain.
3)
Write a note on rRNA.
4)
Name the important biological functions of nucleic acids.
5)
What do you mean by zwitter ion?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Convertmethylisocyanide ⟶ dimethylamine
2)
What is 'spirit of nitre'? Give its use.
3)
Write the uses of nitro alkanes.
4)
Give any two uses of nitrobenzene.
5)
In the given set of reactions, 2 bromopropane \(\xrightarrow [ \triangle ]{ Alc.AgCN } \ 'X'\underrightarrow { { LiAlH }_{ 4 } } 'Y'\). Identify the product Y and give its IUPAC name.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What happens when acetonitrile is hydrolysed?
2)
How will you distinguish between ethylamine and diethylamine?
3)
What happens when aniline is treated with bromine?
4)
Explain why aniline is less basic than methylamine?
5)
Explain why amines are more basic than amides.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Name one reagent used to distinguish acetaldehyde and acetone.
2)
Does formaldehyde undergo aldol condensation? Justify your answer.
3)
What is urotropine? Give its use.
4)
What is formalin? Write its use.
5)
Write a note on haloform reaction.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is DIBAL -H? What is it used for?
2)
Write a note on Etard reaction?
3)
Write the structural formula of 1,1 - dimethoxy ethane. How is it prepared from ethanal?
4)
Acetone is soluble in water but benzophenone is not. Give reason.
5)
Write the structures of A and B in the following reaction. Name the reaction involved.
\({ CH }_{ 3 }COCl\overset { pd/Ba{ SO }_{ 4 } }{ \underset { { H }_{ 2 } }{ \longrightarrow } } A\overset { { NH }_{ 2 }OH }{ \longrightarrow } B\)

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
How will you convert C₂H₅OH to C₂H₅OC₂H₅?
2)
Explain 'esterification' reaction with an example.
3)
What happens when ethylene reacts with alkaline KMnO₄ solution?
4)
Explain why phenol does not undergo substitution of the -OH group like alcohol.
5)
Give chemical test to distinguish between methanol and phenol.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What happens when anisole is nitrated?
2)
Give a test to identify whether a given -OH group is alcoholic or phenolic in nature.
3)
What happens when crotonaldehyde is reduced in the presence of LiAlH₄?
4)
State Saytzeff's rule.
5)
Preparation of ethers by intermolecular dehydration of alcohols in the presence of an add is not a suitable method for mixed ethers. Give reason.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is peptisation? Give an example.
2)
Explain the formation of delta.
3)
Why is a colloidal sol stable?
4)
Which will adsorb more gas, a lump of charcoal or its powder and why?
5)
Name the types of emulsions.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is ultrasonic dispersion?
2)
Why are colloids purified?
3)
Give the methods of purification of colloids.
4)
What is Ultrafilteration?
5)
What is Helmholtz double layer?

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Give an example of secondary cell.
2)
Write the oxidation, reduction and overall redox reaction taking place in the Lithium ion battery.
3)
What is a fuel cell?
4)
Explain how iron is protected from corrosion by coating with magnesium.
5)
What is passivation?

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Give examples of primary cells.
2)
Name the anode, cathode and electrolyte used in lithium - ion Battery
3)
What is known as intercalation?
4)
Write a note on galvanising
5)
What is corrosion?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Give a condition for a compound to be precipitated.
2)
Magnesium is not precipitated from a solution of its salt by a mixture of NH₄OH and NH₄Cl. Explain
3)
BF₃ is termed as an acid though it does not contain H⁺ ions. Explain.
4)
Calculate the ionisation constant for the conjugate base of HF. Ionisation constant of HF at 298 K is 6.8 x 10^-4
5)
Why is aqueous solution of FeCl₃ acidic?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Define neutralisation reaction.
2)
When temperature is increased, will ionic product of water increase or decrease? Give reason to justify your answer.
3)
The K_W of a neutral solution is 10^-12 at a particular temperature. What are its pH and pOH values?
4)
How is common ion effect related to the solubility of the electrolyte?
5)
What are the limitations of Ostwald's dilution law?

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
The decomposition reaction of ammonia gas on platinum surface has a rate constant R = 2.5 x 10^-4mol L^-1. What is the order of the reaction.
2)
For the reaction Cl_{2 (g)} + 2NO _(g)⟶ 2NOCI_(g)
The rate law is expressed as rate = K[Cl₂] [NO]²
What is the overall order of this reaction?
3)
Write the units of zeroth, first, second and third order rate constants.
4)
If the rate of a reaction gets doubled as the temperature is increased from 27^oC to 37^oC. Find the activation energy of reaction?
5)
Mention the factors that affected the rate of a chemical reaction.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
How does the value of rate constant vary with reactant constant.
2)
Answer the following:
(i) Effect the adding catalyst on activation energy and Gibb's energy (ΔG).
(ii) Why do we heat the solution of oxalic acid in redox titration against KMnO₄?
3)
A first order reaction has a specific reaction rate of 10^-3 S^-1. How much time will it take for 10gm of the reactant to reduce to 2.5 gm?
4)
In a reaction, 2A \(\longrightarrow \) products, the concentration of A decreases from 0.5 mol L^-1to 0.4 mol L^-1 in 10 minutes. Calculate the rate during this interval?
5)
Explain how will you find activation energy of a reaction by graphical method.

12th Standard English Medium Chemistry Subject Solid State Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Name the seven primitive crystal systems.
2)
In CaF₂ crystal, Ca²⁺ ions are present in arrangement. Calculate the number of F^- ions in the unit cell.
3)
Distinguish between cubic and hexagonal unit cells.
4)
What is F centre?
5)
A compound forms hexagonal dosed packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

12th Standard English Medium Chemistry Subject Solid State Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?
2)
Which point effect in crystal doesn't alter the density of the relevant solid?
3)
Define void.
4)
Diamond and solid rhombic sulphur are covalent solids but the latter has very low melting point than the former. Explain why?
5)
Define the term: space lattice.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Identify the ligand and the central metal in the Co-ordination compound. [Co(NH₃)₄Cl₆]CI
2)
What are Co-ordination isomers? Give examples
3)
What are stereoisomers?
4)
What is facial isomer?
5)
Give the two isomers of Co₂(CO)₈.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is the coordination number of central metal ion in [Fe(C₂O₄)₃]^3-?
2)
Write the IUPAC name of the complex.
3)
Define 'Ligand' Give an example of neutral ligand.
4)
Write the IUPAC name of [Ag(NH₃)₂]Cl.
5)
Give the chemical formula of potassium trioxalato ferrate(III}

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is hydroformylation of olefins?
2)
What is Zeigler - Natta catalyst?
3)
What are the conditions for alloy formation?
4)
Draw the structure of permanganate ion.
5)
What is Bayer's reagent?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Why Zn²⁺salts are white while Ni²⁺salts are coloured?
2)
Silver atom has completely filled d-orbitals (4d¹⁰) in its ground state. How can you say that it is a transition element?
3)
What happens when KMnO₄ is treated with KI?
4)
Orange colour of Cr₂O₇^2- ion charges to yellow in alkali and yellow solution turns out orange on adding H⁺ ions. Explain why?
5)
Many industrial processes use transition metal or their compounds as catalyst. Why?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
How is SO₂ an air pollutant?
2)
Give the reason for bleaching action of Cl₂.
3)
Arrange the following as indicated below:
(i) F₂, Cl₂, Br₂, I₂ - increasing bond dissociation enthalpy.
(ii) HF, HCI, HBr, HI - increasing acidic strength.
4)
Explain Why in spite of nearly the same electronegativity, nitrogen forms hydrogen bonding while chlorine does not - Give reason.
5)
(i) Nitric oxide becomes brown when released in air. Why?
(ii) BiCl₃ is more stable than BiCl₃, Why?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Give two uses of nitric acid.
2)
What is the reaction of Phosphorous with alkali?
3)
Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?
4)
(i) Give correct order of boiling point of hydride of group 17.
(ii) Fluorine exhibits only -1 oxidation state whereas other halogens show +1, +3, +5 and +7 oxidation state also Explain.
5)
There is a huge difference between the melting and boiling points of oxygen and sulphur. Why?

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What are the uses of silicon tetra chloride?
2)
What is inert pair effect?
3)
Name the building block of zeolites. Why zeolites have high porosity?
4)
Name the two important ores of Boron.
5)
Which one is more soluble in diethyl ether, anhydrous Alcl₃ or hydrated Alcl₃? Explain in terms of bonding.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Explain the formation of boron trifluoride.
2)
Mention the physical properties of boranes.
3)
What are the uses of boron trifluoride?
4)
What is burnt alum?
5)
What is phosgene? How is it prepared?

12th Standard English Medium Chemistry Subject Metallurgy Creative 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 21, 2021 - View & Read

1)
What is the role of graphite rods in the electro metallurgy of aluminium?
2)
Name and discuss the principle involved in obtaining silicon of high purity.
3)
Give reason : Extraction of copper directly from sulphide ores is less favourable than from its oxide ores through reduction.
4)
Define metallurgy.
5)
Define roasting.

12th Standard English Medium Chemistry Subject Metallurgy Creative 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 21, 2021 - View & Read

1)
Name some common methods of ore concentration.
2)
Name some reducing agents used to convert Metal oxides to metal
3)
Name the various refining process.
4)
Why are sulphide ores converted to oxide form before reduction to metal?
5)
Write the two similarities between calcination and roasting.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Zeiglar Natta catalyst is _________
2)
Addition polymerisation is also called as _______ polymerisation.
3)
The polymer obtained by the condensation of phenol with formaldehyde is ________
4)
The specific treatment of a disease using medicine is known as ________
5)
Proteins which act as biological catalysts are called ________

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Sulphur dioxide act as _________
2)
The monomer of PVC is _______
3)
Which of the following is not a non - narcotic analgesic?
4)
Zeiglar Natta catalyst is _________
5)
Addition polymerisation is also called as _______ polymerisation.

12th Standard English Medium Chemistry Subject Biomolecules Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The sugar unit present in nucleic acid is___________
2)
Penta hydroxy hexanone is__________
3)
In acidic solution an amino acid, when placed in an electric field__________
4)
The precipitation of protein is called_________
5)
Hydrolysis of cellulose yields_______

12th Standard English Medium Chemistry Subject Biomolecules Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Which is a monosaccharide among the following?
2)
Sucrose is not
3)
Glucose is not oxidised to gluconic acid by
4)
The amino acid without chiral carbon is
5)
Which is not true of amino acid?

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The compound that does not show tautomerism is ____________
2)
CCl₃ NO₂ is used as ________
3)
Use of chloropicrin is as ____________
4)
Oxidation of aniline with acidified K₂Cr₂O₇ gives ___________
5)
The intermediate formed in the nitration of benzene is _________

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
C₆H₅NH₂\(\underrightarrow { { NANO }_{ 2 }/HCl } \) X Identify X.
2)
Aniline differs from ethylamine by the reaction with
3)
Which among the following dissolves in NaOH?
4)
When nitro methane condenses with acetone it gives
5)
Which gives an yellow oil with nitrous acid?

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
With respect to the reagents given below, pick out the odd one _________.
2)
Formic acid contains _______ groups
3)
acid chloride + alcohol \(\longrightarrow\)?.
4)
CH₃CHO and C₆H₅CH₂CHO can be distinguished by ______.
5)
\(Phenol\overset { Zn }{ \underset { dust }{ \longrightarrow } } 'X'\overset { { CH }_{ 3 }Cl }{ \underset { anhy\ AlC{ I }_{ 3 } }{ \longrightarrow } } Y\overset { alk }{ \underset { { KMnO }_{ 4 } }{ \longrightarrow Z } } \) the product Z is __________.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Cannizaro reaction is not given by _______.
2)
The IUPAC name of the compound
3)
Identify 'X'.
4)

Choose a suitable reagent to carry out the above reaction.
5)
A compound 'X' when mixed with ethanol and a drop of concentrated H₂SO₄ gave a compound with fruity odour. Identify 'X'.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The number of possible isomers for molecular formula C₄H₁₀O is _________.
2)
The number of alcohol isomers for molecular formula C₄H₁₀O is ________.
3)
CH₃-CH₂-O-CH₂CH₃ and \({ CH }_{ 3 }-O-\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 3 }\) are examples of _______ isomerism.
4)
_______ cannot be prepared by using Grignard reagent.
5)
On heating, peroxides are ________.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Which of the following has an offensive odour?
2)
Which of the following is not correct? Glycerol is used as ______.
3)
Which one of the following is optically active?
4)
The compound that does not undergo Cannizaro reaction is ______.
5)
Which one of the following is simple ether?

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Decomposition of hydrogen peroxide is retarded in the presence of________.
2)
The emulsifying agent used in O/W type is _______.
3)
Emulsifying agent is used for________.
4)
The colloid used for stomach disorder is_______.
5)
Argyrol is_______.

12th Standard English Medium Chemistry Subject Surface Chemistry Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The phenomenon of Tyndall's effect is not observed in _______.
2)
Colloidal medicines are more efffective because _______.
3)
Oil soluble dye is mixed with emulsion and emulsion remains colourless then, the emulsion is _______.
4)
For chemisorption, which is wrong?
5)
Colloids are purified by _______.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The electrode where there is gain of electrons is called ______.
2)
The zinc - copper cell has emf of _______.
3)
For gases, the standard emf depends on _______.
4)
SHE is _______.
5)
The feasibility of a redox reaction can be predicted with the help of ________.

12th Standard English Medium Chemistry Subject Electro Chemistry Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid ______.
2)
NH₄OH is a weak base because ______.
3)
An example for 1 : 1 electrolyte is ______.
4)
According to Faraday's first law m = ZIt, where Z is ______.
5)
1 mho is equal to ______.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
\({ X }_{ m }{ Y }_{ n(s) }\overset { { H }_{ 2 }O }{ \rightleftharpoons } { mX }_{ (aq) }^{ n+ }+{ nY }_{ (aq) }^{ m- }\)
2)
Which among the following is incorrect regarding acids?
3)
When sodium acetate is added to acetic acid, the degree of ionisation of acetic acid _______.
4)
Which one of the following formula represents Ostwald's dilution law for a binary whose degree of dissociation is a and concentration C.
5)
Which one of the following relationship is correct?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Pick out the incorrect statement regarding Lewis acids and bases
2)
With regard to the strength of acids and bases, Find the incorrect statement among the following.
3)
HCl is a strong acid since _______.
4)
Ionic product of water increases when _______.
5)
An aqueous solution with pH value zero is _______.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
CH₃COOCH₃ + H₂O \(\overset { { H }^{ + } }{ \longrightarrow } \) CH₃COOH + CH₃OH is an example of _______ order reaction.
2)
For a general reaction aA + bB ⟶Products, the rate of the reaction is equal to______.
3)
In a second order reaction, if one of the concentration is excess, the order of the reaction is ________ order reaction.
4)
If [A] is the concentration of A at any time t and [A_o] is the concentration at t = 0, then for the first order reaction, the rate equation can be written as ______.
5)
Activation energy of a reactant is reduced by ________.

12th Standard English Medium Chemistry Subject Chemical Kinetics Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The Unit of rate constant and rate of reaction are same for ______.
2)
Which of the following statement is not correct?
3)
For an exothermic chemical process occurring in 2 steps as
(i) A +B ⟶ X (slow) ;
(ii) X ⟶ AB (fast)
The progress of the reaction can be best described by (x- intermediate).
4)
Nitric oxide (NO) reacts with oxygen to produce nitrogen dioxide
2NO_(g) + O_2(g) ⟶ 2NO_2(g)
If the mechanism of reaction is ______.
NO + O₂ \(\overset { K }{ \rightleftharpoons } \) NO₃ (fast)
NO₃ + NO \(\overset { { K }_{ 1 } }{ \rightleftharpoons } \) NO₂ + NO₂ (slow)
5)
A reaction having equal activation energies for forward and reverse reactions has ______.

12th Standard English Medium Chemistry Subject Solid State Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
If electrical conductivity is found to be same in all directions through a solid the substance is ________ solid and the property is called _________.
2)
Coordination number of tetrahedral and octahedral voids respectively are________.
3)
Crystals of NaCI has yellow colour due the presence of_________.
4)
Structure of B₂O₃ is _____.
5)
The correct order of packing efficiency in different types of unit cells is________.

12th Standard English Medium Chemistry Subject Solid State Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?
2)
What is wrong about a.b.c.c. unit cell?
3)
Which one of the following does not belong to AB type?
4)
The smallest repeating unit in space lattice which when repeated over and again results in the crystal of the given substance is called_______.
5)
The number of close neighbours in a body centred cubic lattice of identifical spheres is _______.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
_______ valencies are directional in nature.
2)
The number of trans positions in a octahedral complex is _________.
3)
The chemical formula for diammine silver (I) chloride is _______.
4)
Magnetic moment is given by the formula _______.
5)
The oxidation state of the central metal ion in the complex [Co(H₂O)(CN)(en)₂]²⁺ is________.

12th Standard English Medium Chemistry Subject Coordination Chemistry Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Primary and secondary valencies of Cu in [Cu(NH₃)₄]SO₄ is _______.
2)
Which of the following octahedral complexes do not show geometrical isomerism?
3)
The spin only magnetic moment of [Mnfsr₄]^2- is 5.9 BM. Geometry of the complex ion is _______.
4)
According to CFT, five d-orbitals of an octahedral complex split to give _______.
5)
Which of the following is correct statement?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
________ has the highest electrical conductivity at room temperature.
2)
If the standard electrode potential (E^o) of a metal is ________ and __________ the metal is a powerful reducing agent.
3)
Equivalent weight of KMnO₄ in acidic medium is _______.
4)
The common oxidation state of lanthanoids is ________.
5)
_________ is known as Bayer's reagent.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The highest possible oxidation state shown by osmium in its compound is_______.
2)
The trend in ionisation enthalpy of a transition element is not regular because,_______.
3)
Which one of the following exhibits highest oxidation state?
4)
Which of the following is coloured due to charge transfer?
5)
What are the species X and Y in the following?

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The incorrect statement regarding structure of ozone is______.
2)
Strong reducing behaviour of H₃PO₂ is due to______.
3)
Which reaction is not feasible.
4)
The ionisation energy of Ga is higher than that of Al because of_________
5)
The high reactivity of fluorine is due to________.

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Catenation property of group 15 elements, follow the order _______.
2)
Which is dibasic?
3)
Allotrope of sulphur which shows paramagnetic behaviour _______.
4)
Pick the wrong one among the following
5)
When Copper is heated with cone HNO₃ it produces

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Elements of group 13 mainly form covalent compounds because ______
2)
All elements except carbon have the tendency to show maximum covalency of six ______
3)
Group 14 elements have general electronic configuration _______.
4)
The silicates which contain discrete tetrahedral units are _______.
5)
Borax is _______.

12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The stability of +1 oxidation state among Al, Ga, In and Tl increases in sequence _______.
2)
Chemical formula of phosgene is_______.
3)
SiO₄^4- ion has ____ geometry.
4)
Which of the following oxide is amphoteric?
5)
Which of the following statements about H₃BO₃ is not correct?

12th Standard English Medium Chemistry Subject Metallurgy Creative 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 18, 2021 - View & Read

1)
The percentage of carbon in high carbon steel is_________.
2)
Steel is an alloy of___________
3)
Sodium cyanide solution is used to extract _________from its ores
4)
Galena is_______.
5)
In Hall-Heroult process ___________act as an anode.

12th Standard English Medium Chemistry Subject Metallurgy Creative 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 18, 2021 - View & Read

1)
Which of the following is not a mineral of aluminium?
2)
Among the following, one does not belong to calcination, Pick the odd one out.
3)
Name the process by which elements such as germanium, silicon and gallium are refined.
4)
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with________.
5)
Which one of the following element is present as a impurity in pig iron?

12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
The selection of reducing agent depends on the thermodynamic factor: Explain with an example.
2)
How will you convert boric acid to boron nitride?
3)
Give a reaction between nitric acid and a basic oxide.
4)
The E⁰_M²⁺/M value for copper is positive. Suggest a possible reason for this.
5)
A solution of [Ni(H₂O)₆]²⁺ is green, whereas a solution of [Ni(CN)₄]^2- is colorless -Explain

12th Standard English Medium Chemistry Subject Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Explain the principle of electrolytic refining with an example.
2)
Write a note on zeolites.
3)
Give two equations to illustrate the chemical behaviour of phosphine.
4)
Which is stronger reducing agent Cr²⁺ or Fe²⁺?
5)
What is crystal field stabilization energy (CFSE)?

12th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Explain the following terms with suitable examples.
(i) Gangue
(ii) slag
2)
AlCl₃behaves like a lewis acid. Substantiate this statement.
3)
How will you prepare chlorine in the laboratory?
4)
Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.
5)
What is linkage isomerism? Explain with an example.

12th Standard English Medium Chemistry Subject Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Explain the electrometallurgy of aluminium.
2)
Describe the structure of diborane.
3)
Give a reason to support that sulphuric acid is a dehydrating agent.
4)
Explain the variation in E⁰_{M³⁺/M²⁺} 3d series.
5)
Classify the following ligands based on the number of donor atoms.
a) NH₃
b) en
c) ox^2-
d) pyridine

12th Standard English Medium Chemistry Subject Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What are the differences between minerals and ores?
2)
Write a note on Fisher tropsch synthesis.
3)
Chalcogens belongs to p-block. Give reason.
4)
Why Gd³⁺ is colourless?
5)
Arrange the following in order of increasing molar conductivity
(i) Mg[Cr(NH₃)(Cl)₅]
(ii) Cr(NH₃)₅Cl]₃[CoF₆]₂
(iii) [Cr(NH₃)₃Cl₃]

12th Standard English Medium Chemistry Subject Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What is the role of quick lime in the extraction of Iron from its oxide Fe₂O₃?
2)
What is catenation ? describe briefly the catenation property of carbon.
3)
Explain why fluorine always exhibit an oxidation state of -1?
4)
Justify the position of lanthanoids and actinoids in the periodic table.
5)
Write the IUPAC names for the following complexes.

12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Which of the metal is extracted by Hall-Heroult process?
2)
Which of the following reduction is not thermodynamically feasible?
3)
Duralumin is an alloy of ______.
4)
Which of the following is strongest acid among all?
5)
The catalytic behaviour of transition metals and their compounds is ascribed mainly due to _______.

12th Standard English Medium Chemistry Subject Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Roasting of sulphide ore gives the gas (A).(A) is a colourless gas. Aqueous solution of (A) is acidic. The gas (A) is______.
2)
The following set of reactions are used in refining Zirconium
\(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
\({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.
3)
In diborane, the number of electrons that accounts for banana bonds is ________.
4)
Which is true regarding nitrogen?
5)
Which of the following does not give oxygen on heating?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What are narcotic and non – narcotic drugs. Give examples
2)
Write a note on co –polymer
3)
How is terylene prepared?
4)
Classify the following as linear, branched or cross linked polymers
a) Bakelite
b) Nylon-6,6
c) polythene (HDPE)
d) polythene (LDPE)

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What are anti fertility drugs? Give examples.
2)
What are bio degradable polymers? Give examples.
3)
Write a note on vulcanization of rubber
4)
Differentiate thermoplastic and thermosetting.

12th Standard English Medium Chemistry Subject Biomolecules Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Define enzymes
2)
Write the structure of α-D (+) glucophyranose
3)
What are different types of RNA which are found in cell
4)
Write a note on formation of α-helix .
5)
What are the functions of lipids in living organism.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
How will you convert diethylamine into
i) N, N – diethylacetamide
ii) N – nitrosodiethylamine
2)
Identify A,B and C
\(\overset{SOCl_2}\longrightarrow A \overset{NH_3}\longrightarrow B\overset{LiAlH_4}\longrightarrow (C)\)
3)
Complete the following reaction
4)
Predict A,B,C and D for the following reaction
5)
Identify A to E in the following sequence of reactions

\(\overset { {CH_3} {CL} }{ \underset { {AlCl}_3 }{ \longrightarrow } }\) A \(\overset { {HNO_3}/ {H_2So_4} }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { {Sn} /{HCL} }{ \underset {{} }{ \longrightarrow } }\) (C) \(\overset { {NaNo_2}/ {HCL} }{ \underset { {O^o}C }{ \longrightarrow } }\) D \(\overset { {CuCN} }{ \underset { {}}{ \longrightarrow } }\) E

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Write the structure of the major product of the aldol condensation of benzaldehyde with acetone.
2)
How are the following conversions effected
(a) propanal into butanone
(b) Hex-3-yne into hexan-3-one.
(c) phenylmethanal into benzoic acid
(d) phenylmethanal into benzoin
3)
Complete the following reaction
\({ CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 2 }-\underset { \overset { || }{ O } }{ C } -{ CH }_{ 3 }\overset { HO-{ CH }_{ 2 }-{ CH }_{ 2 }-OH }{ \underset { { dry }{ HCl} }{ \longrightarrow } } ?\)
4)
Identify A, B and C

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
How will you convert acetylene into n-butyl alcohol.
2)
Complete the following reactions

ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)
3)

Identify A,B,C,D and write the complete equation
4)
0.44g of a monohydric alcohol when added to methyl magnesium iodide in ether liberates at STP 112 cm³ of methane with PCC the same alcohol form a carbonyl compound that answers silver mirror test. Identify the compound.
5)
An organic compound (A) of molecular formula C₆H₆O gives violet colour with neutral FeCI₃. (A) gives maximum of two isomers (B) and (C) when an alkaline solution of (A) is refluxed with CCI₄ (A) also reacts with C₆H₅N₂CI to give the compound (D) which is red orange dye. Identify (A), (B), (C) and (D). Explain with suitable chemical reactions.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What will be the product (X and A) for the following reaction acetylchloride \(\frac{\text { i) } \mathrm{CH}_{3} \mathrm{MgBr}}{\text { ii) } \mathrm{H}_{3} \mathrm{O}^{+}}{\longrightarrow} \mathrm{X} \stackrel{\text { acid } \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}}{\longrightarrow}\) A
2)
Predict the product A,B,X and Y in the following sequence of reaction
3)
Phenol is distilled with Zn dust followed by friedel – crafts alkylation with prophyl chloride to give a compound B, B on oxidation gives (c) Indentify A,B and C.
4)
Complete the following reactions
i) CH_3- CH₂ - OH \(\overset { { P}{ Br_3 }{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { aq.NaOH}{ }{ } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { { Na}{ } }{ \underset { {} }{ \longrightarrow } }\) C
ii) C₆H₅- OH \(\overset { { Zn \ dust}{ } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { CH_3}{Cl}{ } }{ \underset { {Anhydrs}{AlCl_3} }{ \longrightarrow } }\) B \(\overset { { acid}{K MnO_4}{ } }{ \underset { {} }{ \longrightarrow } }\) C
5)
An organic compound (A) molecular formula CH₂O reacts with CH₃MgI to give compound (B). Compound (B) liberates Hydrogen with metallic sodium. Compound (B) in the presence of Con. H₂SO₄ at 410 K on dehydration to give compound (C) molecular formula C₄H₁₀O. Identify (A), (B) and (C). Explain the above reactions.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Why does bleeding stop by rubbing moist alum
2)
Comment on the statement: Colloid is not a substance but it is a state of substance.
3)
Write a note on electro osmosis.
4)
Explain intermediate compound formation theory of catalysis with an example.
5)
Describe adsorption theory of catalysis

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
In fuel cell H₂and O₂ react to produce electricity. In the process, H₂ gas is oxidised at the anode and O₂ at cathode. If 44.8 litre of H₂ at 25⁰C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu²⁺, how many grams of Cu deposited?
2)
A copper electrode is dipped in 0.1M copper sulphate solution at 25^oC. Calculate the electrode potential of copper. [Given: E⁰_Cu²⁺|Cu= 0.34V].
3)
9.2\(\times\)10¹² litres of water is available in a lake. A power reactor using the electrolysis of water in the lake, produces electricity at the rate of 2\(\times\)10⁶Cs⁻¹ at an appropriate voltage. How many years would it take to completely electrolyse the water in the lake. Assume that there is no loss of water except due to electrolysis.
4)
Write a note on sacrificial protection.
5)
Ionic conductance at infinite dilution of Al³⁺ and SO₄^2- are 189 and 160 mho cm² equiv^-1. Calculate the equivalent and molar conductance of the electrolyte Al₂(SO₄)₃ at infinite dilution.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
In fuel cell H₂and O₂ react to produce electricity. In the process, H₂ gas is oxidised at the anode and O₂ at cathode. If 44.8 litre of H₂ at 25⁰C and 1 atm pressure reacts in 10 minutes, what is average current produced? If the entire current is used for electro deposition of Cu from Cu²⁺, how many grams of Cu deposited?
2)
A copper electrode is dipped in 0.1M copper sulphate solution at 25^oC. Calculate the electrode potential of copper. [Given: E⁰_Cu²⁺|Cu= 0.34V].
3)
9.2\(\times\)10¹² litres of water is available in a lake. A power reactor using the electrolysis of water in the lake, produces electricity at the rate of 2\(\times\)10⁶Cs⁻¹ at an appropriate voltage. How many years would it take to completely electrolyse the water in the lake. Assume that there is no loss of water except due to electrolysis.
4)
Write a note on sacrificial protection.
5)
Ionic conductance at infinite dilution of Al³⁺ and SO₄^2- are 189 and 160 mho cm² equiv^-1. Calculate the equivalent and molar conductance of the electrolyte Al₂(SO₄)₃ at infinite dilution.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Solubility product of Ag₂CrO₄ is \(1\times10^{-12}\). What is the solubility of Ag₂CrO₄ in 0.01M AgNO₃ solution?
2)
A saturated solution, prepared by dissolving CaF₂(s) in water, has \([Ca^{2+}]=3.3\times10^{-4}M\). What is the K_sp of CaF₂?
3)
A particular saturated solution of silver chromate Ag₂CrO₄ has \([Ag^{+}]=5\times10^{-5}\) and \([CrO_{4}]^{2-}=4.4\times10^{-4}M\). What is the value of K_sp for Ag₂ CrO₄?
4)
K_sp of Ag₂CrO₄ is \(1.1\times10^{-12}\). What is solubility of Ag₂CrO₄ in 0.1M K₂CrO₄.
5)
K_spof Al(OH)₃ is 1\(\times\)10^-15M. At what pH does 1.0×10^-3M Al³⁺ precipitate on the addition of buffer of NH₄Cl and NH₄OH solution?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
K_sp of AgCl is \(1.8\times10^{-10}\). Calculate molar solubility in 1 M AgNO₃
2)
Write the expression for the solubility product of Hg₂Cl₂ .
3)
Will a precipitate be formed when 0.150 L of 0.1M Pb(NO₃)₂ and 0.100L of 0.2 M NaCl are mixed? \(K_{sp}\ (PbCl_{2})=1.2\times10^{-5}\).
4)
What is the pH of an aqueous solution obtained by mixing 6 gram of acetic acid and 8.2 gram of sodium acetate and making the volume equal to 500 ml. (Given: K_a for acetic acid is \(1.8\times10^{-5}\))
5)
Establish a relationship between the solubility product and molar solubility for the following
a) BaSO₄
b) Ag₂(CrO₄)

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
How do concentrations of the reactant influence the rate of reaction?
2)
The rate constant for a first order reaction is 1.54 x 10^-3 s^-1. Calculate its half life time.
3)
The time for half change in a first order decomposition of a substance A is 60 seconds. Calculate the rate constant. How much of A will be left after 180 seconds?
4)
The activation energy of a reaction is 22.5 k Cal mol^-1and the value of rate constant at 40°C is 1.8 x 10^-5s^-1. Calculate the frequency factor, A.
5)
The rate constant of a reaction at 400 and 200K are 0.04 and 0.02 s^-1respectively. Calculate the value of activation energy.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
How do nature of the reactant influence rate of reaction.
2)
The half life of the homogeneous gaseous reaction SO₂Cl₂→ SO₂ + Cl₂ which obeys first order kinetics is 8.0 minutes. How long will it take for the concentration of SO₂Cl₂ to be reduced to 1% of the initial value?
3)
A zero order reaction is 20% complete in 20 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?
4)
A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?
5)
Rate constant k of a reaction varies with temperature T according to the following Arrhenius equation \(\log K=\log A-\frac { { E }_{ a } }{ 2.303R } \left( \frac { 1 }{ T } \right) \)Where E_a is the activation energy. When a graph is plotted for log k Vs \(\frac{1}{T}\) a straight line with a slope of -4000K is obtained. Calculate the activation energy.

12th Standard English Medium Chemistry Subject Solid State Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
An element has bcc structure with a cell edge of 288 pm. The density of the element is 7.2 g cm^-3. How many atoms are present in 208 g of the element.
2)
If NaCl is doped with 10^-2 mol percentage of strontium chloride, what is the concentration of cation vacancy?
3)
KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K⁺ and F⁻ in KF. (given : density of KF is 248 g cm^-3)
4)
An atom crystallizes in fcc crystal lattice and has a density of 10 gcm⁻³ with unit cell edge length of 100pm. Calculate the number of atoms present in 1 g of crystal.
5)
Sodium metal crystallizes in bcc structure with the edge length of the unit cell 4.3 x 10^-8cm. Calculate the radius of sodium atom.

12th Standard English Medium Chemistry Subject Solid State Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What is meant by the term “coordination number”? What is the coordination number of atoms in a bcc structure?
2)
Aluminium crystallizes in a cubic close packed structure. Its metallic radius is 125pm. calculate the edge length of unit cell.
3)
KF crystallizes in fcc structure like sodium chloride. Calculate the distance between K⁺ and F⁻ in KF. (given : density of KF is 248 g cm^-3)
4)
Atoms X and Y form bcc crystalline structure. Atom X is present at the corners of the cube and Y is at the centre of the cube. What is the formula of the compound?
5)
Write a note on Frenkel defect.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Explain optical isomerism in coordination compounds with an example.
2)
What is crystal field splitting energy?
3)
A solution of [Ni(H₂O)₆]²⁺ is green, whereas a solution of [Ni(CN)₄]^2- is colorless -Explain
4)
What is the coordination entity formed when excess of liquid ammonia is added to an aqueous solution of copper sulphate?
5)
What are the limitations of VB theory?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What are hydrate isomers? Explain with an example.
2)
What is crystal field stabilization energy (CFSE)?
3)
Discuss briefly the nature of bonding in metal carbonyls.
4)
On the basis of VB theory explain the nature of bonding in [Co(C₂O₄)₃]^3-
5)
Write the oxidation state, coordination number , nature of ligand, magnetic property and electronic configuration in octahedral crystal field for the complex K₄[Mn(CN)₆]

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 5 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Why europium (II) is more stable than Cerium (II)?
2)
Which is stronger reducing agent Cr²⁺ or Fe²⁺?
3)
Predict which of the following will be coloured in aqueous solution Ti²⁺, V³⁺, Sc⁴⁺, Cu⁺, Sc³⁺, Fe³⁺, Ni²⁺ and Co³⁺
4)
Which metal in the 3d series exhibits +1 oxidation state most frequently and why?
5)
Transition metals show high melting points. Why?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Out of Lu(OH)₃ and La(OH)₃ which is more basic and why?
2)
Why do zirconium and Hafnium exhibit similar properties?
3)
The E⁰_M²⁺/M value for copper is positive. Suggest a possible reason for this.
4)
Describe the variable oxidation state of 3d series elements.
5)
Why first ionization enthalpy of chromium is lower than that of zinc?

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give two equations to illustrate the chemical behaviour of phosphine.
2)
Give a reaction between nitric acid and a basic oxide.
3)
Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.
4)
Deduce the oxidation number of oxygen in hypofluorous acid – HOF.
5)
Complete the following reactions.
\(1. \mathrm{NaCl}+\mathrm{MnO}_{2}+\mathrm{4H}_{2} \mathrm{SO}_{4} \longrightarrow \)
\(2. \mathrm{NaNO}_{2}+\mathrm{HCl} \longrightarrow \)
\(3.\mathrm{P}_{4}+\mathrm{3NaOH}+\mathrm{3H}_{2} \mathrm{O} \longrightarrow \)
\(4. \mathrm{AgNO}_{3}+\mathrm{PH}_{3} \longrightarrow \)
\(5. \mathrm{Mg}+\mathrm{10HNO}_{3} \longrightarrow \)
\(6. \mathrm{KClO}_{3} \stackrel{\Delta}{\longrightarrow} \)
\(7. \mathrm{Cu}+Con. \ Hot \ \mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow\)
\(8. \mathrm{Sb}+\mathrm{Cl}_2 \longrightarrow \)
\(9. \mathrm{HBr}+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow \)
\(10. \mathrm{XeF}_6+\mathrm{H}_2 \mathrm{O} \longrightarrow \)
\(11. \mathrm{XeO}_6{ }^{4-}+\mathrm{Mn}^{2+}+\mathrm{H}^{+} \longrightarrow \)
\(12. \mathrm{XeOF}_4+\mathrm{SiO}_2 \longrightarrow \)
\(13. \mathrm{Xe}+\mathrm{F}_2 \frac{\mathrm{Ni} / 200 \mathrm{~atm}}{400^{\circ} \mathrm{C}}\).

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give two equations to illustrate the chemical behaviour of phosphine.
2)
What happens when PCl₅ is heated?
3)
Suggest a reason why HF is a weak acid, whereas binary acids of the all other halogens are strong acids.
4)
Deduce the oxidation number of oxygen in hypofluorous acid – HOF.
5)
What type of hybridisation occur in
a) BrF₅
b) BrF₃

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
How will you identify borate radical?
2)
Write a note on zeolites.
3)
How will you convert boric acid to boron nitride?
4)
A hydride of 2nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). Identify A, B and C.
5)
CO is a reducing agent. Justify with an example.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 5 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Describe the role of the following in the process mentioned.
(i) Silica in the extraction of copper.
(ii) Cryolite in the extraction of aluminium.
(iii) Iodine in the refining of Zirconium.
(iv) Sodium cyanide in froth floatation.
2)
Explain the principle of electrolytic refining with an example.
3)
The selection of reducing agent depends on the thermodynamic factor: Explain with an example.
4)
Give the limitations of Ellingham diagram.
5)
Write a short note on electrochemical principles of metallurgy.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Who do soaps not work in hard water?
2)
What are drugs? How are they classified.
3)
How the tranquilizers work in body.
4)
Write the structural formula of aspirin.
5)
Explain the mechanism of cleansing action of soaps and detergents.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What are drugs? How are they classified.
2)
How the tranquilizers work in body.
3)
Write the structural formula of aspirin.
4)
Explain the mechanism of cleansing action of soaps and detergents.
5)
Which sweetening agent are used to prepare sweets for a diabetic patient?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Write a note on denaturation of proteins.
2)
What are reducing and non – reducing sugars?
3)
Why carbohydrates are generally optically active.
4)
Classify the following into monosaccharides, oligosaccharides and polysaccharides.
i) Starch
ii) fructose
iii) sucrose
iv) lactose
iv) maltose
5)
How are vitamins classified?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give two difference between Hormones and vitamins.
2)
Write a note on denaturation of proteins.
3)
Why carbohydrates are generally optically active.
4)
How are vitamins classified?
5)
What are harmones? Give examples

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
How will you distinguish between primary secondary and tertiary alphatic amines.
2)
Account for the following
i. Aniline does not undergo Friedel – Crafts reaction
ii. Diazonium salts of aromatic amines are more stable than those of aliphatic amines
iii. pK_b of aniline is more than that of methylamine
iv. Gabriel phthalimide synthesis is preferred for synthesising primary amines.
v. Ethylamine is soluble in water whereas aniline is not
vi. Amines are more basic than amides
vii.Although amino group is o – and p – directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m – nitroaniline.
3)
Arrange the following
i. In increasing order of solubility in water, C₆H₅ NH₂, (C₂H₅)₂NH, C₂H₅NH₂
ii. In increasing order of basic strength
a) aniline, p- toludine and p – nitroaniline
b) C₆H₅ NH₂, C₆H₅ NHCH₃, C₆H₅NH₂, p-Cl-C₆- H₄-NH₂
iii. In decreasing order of basic strength in gas phase
(C₂H₅)NH₂, (C₂H₅)NH, (C₂H₅)₅N and NH₃
iv. In increasing order of boiling point
C₆H₅OH, (CH₃)₂NH, C₂H₅NH₂
v. In decreasing order of the pK_b values
C₂H₅NH₂, C₆H₅NHCH₃.(C₂H₅)₂ NH and CH₃NH₂
vi. Increasing order of basic strength
C₂H₅NH₂,C₆H₅N(CH₃)₂, (C₂H₅)₂ NH and CH₃NH₂
vii. In decreasing order of basic strength
4)
How will you prepare propan – 1- amine from
i) butane nitrile
ii) propanamide
ii) 1- nitropropane
5)
Identify A,B,and C
CH₃- NO₂ \(\overset { { L }_{ 1 }{AlH }_{ 4 } }{ \underset { {} }{ \longrightarrow } }\) A \(\overset { { 2CH_3 }{Ch_2Br } }{ \underset { {} }{ \longrightarrow } }\) B \(\overset { {H}_{ 2 }{SO}_{ 4 } }{ \underset { {} }{ \longrightarrow } } \) C

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Identify A, B, C and D
\(\text { ethanoic acid } \stackrel{\mathrm{SOCl}_{2}}{\longrightarrow} \mathrm{A} \stackrel{\mathrm{Pd} / \mathrm{BaSO}_{4}}{\longrightarrow} \mathrm{B} \stackrel{\mathrm{NaOH}}{\longrightarrow} \mathrm{C} \stackrel {\longrightarrow}{\triangle} \mathrm{D}\)
2)
An alkene (A) on ozonolysis gives propanone and aldehyde (B). When (B) is oxidised (C) is obtained. (C) is treated with Br₂/P gives (D) which on hydrolysis gives (E). When propanone is treated with HCN followed by hydrolysis gives (E). Identify A, B, C, D and E.
3)
How will you convert benzaldehyde into the following compounds?
(i) benzophenone
(ii) benzoic acid
(iii) α-hydroxyphenylaceticacid.
4)
What is the action of HCN on
(i) propanone
(ii) 2,4-dichlorobenzaldehyde
iii) ethanal
5)
A carbonyl compound A having molecular formula C₅H₁₀O forms crystalline precipitate with sodium bisulphate and gives positive iodoform test. A does not reduce Fehling solution. Identify A.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
How is phenol prepared from
i) chloro benzene
ii) isopropyl benzene
2)
Write the chemical equation for Williamson synthesis of 2-ethoxy – 2- methyl pentane starting from ethanol and 2 – methyl pentan -2-ol.
3)
What is metamerism? Give the structure and IUPAC name of metamers of 2-methoxy propane
4)
When tertiary butyl alcohol and 1-butanol are separately treated with a few drops of KMnO₄, in one case only the purple colour disappears and a brown precipitate is formed. Which of the two alcohols gives the above reaction and what is that brown precipitate?
5)
Give the Grignard reagent and carbonyl compound that can be used to prepare.
(a) CH₃-CH₂-CH₂-OH
(b) (CH₃)₂C(OH)CH₂CH₂CH₃
(c) C₆H₅CH₂CH(OH)CH₃

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Write the mechanism of acid catalysed dehydration of ethanol to give ethene.
2)
Write Kolbe’s reaction.
3)
Write the structure of the aldehyde, carboxylic acid and ester that yield 4- methylpent -2-en-1-ol.
4)
How are the following conversions effected
i) benzylchloride to benzylalcohol
ii) benzyalalcohol to benzoic acid
5)
Compound (A) C₆H₁₂O₂ on reduction with LiAlH₄ yields two compounds B and C. The compound (B) on oxidation gave (D) which on treatment with aqueous alkali and subsequent heating furnished E. The latter on catalytic hydrogenation gave (C). Compound (D) on oxidation gave monobasic acid (molecular formula weight = 60). Deduce the structure of (A), (B), (C), (D) and (E).

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What happens when a colloidal sol of Fe(OH)₃ and As₂S₃ are mixed?
2)
Why are lyophillic colloidal sols are more stable than lyophobic colloidal sol.
3)
What are the factors which influence the adsorption of a gas on a solid?
4)
What do you mean by activity and selectivity of catalyst?
5)
Describe some feature of catalysis by Zeolites.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Peptising agent is added to convert precipitate into colloidal solution. Explain with an example.
2)
What is the difference between a sol and a gel?
3)
Addition of Alum purifies water. Why?
4)
What are enzymes? Write a brief note on the mechanism of enzyme catalysis.
5)
Describe some feature of catalysis by Zeolites.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
The conductivity of a 0.01M solution of a 1 :1 weak electrolyte at 298K is 1.5\(\times\)10^-4 S cm⁻¹.
i) molar conductivity of the solution
ii) degree of dissociation and the dissociation constant of the weak electrolyte
Given that
\(\lambda^{0}_{cation}=248.2 \ S\) cm² mol^-1
\(\lambda^{0}_{anlon}=51.8 \ S\) cm² mol^-1
2)
Why is AC current used instead of DC in measuring the electrolytic conductance?
3)
A current of 1.608A is passed through 250 mL of 0.5M solution of copper sulphate for 50 minutes. Calculate the strength of Cu²⁺ after electrolysis assuming volume to be constant and the current efficiency is 100%.
4)
Is it possible to store copper sulphate in an iron vessel for a long time?
Given : \(E^{0}_{Cu^{2+}|Cu} = 0.34\) V and \(E^{0}_{Fe^{2+}|Fe} = -0.44\)V.
5)
Reduction potential of two metals M₁ and M₂ are \(E^{0}_{M^{2+}_{1}|M_{1}} = -2.3V\) and \(E^{0}_{M^{2+}_{1}|M_{1}} = 0.2V\) Predict which one is better for coating the surface of iron. Given : \(\mathrm{E}_{\mathrm{Fe}^{2+} \mid \mathrm{Fe}}^{\circ}=-0.44 \mathrm{~V}\)

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Arrange the following solutions in the decreasing order of specific conductance.
i) 0.01M KCl
ii) 0.005M KCl
iii) 0.1M KCl
iv) 0.25M KCl
v) 0.5M KCl
2)
0.1M NaCl solution is placed in two different cells having cell constant 0.5 and 0.25 cm^-1 respectively. Which of the two will have greater value of specific conductance.
3)
Can Fe³⁺ oxidises Bromide to bromine under standard conditions?
Given: \({ E }_{ { Fe }^{ 3+ }|{ Fe }^{ 2+ } }^{ 0 }=0.771V\); \(\\ { E }^{0}_{ { Br }_{ 2 }|{ Br }^{ - } }=1.09V\).
4)
Two metals M₁ and M₂ have reduction potential values of -xV and +yV respectively. Which will liberate H₂ and H₂SO₄.
5)
A solution of silver nitrate is electrolysed for 20 minutes with a current of 2 amperes. Calculate the mass of silver deposited at the cathode.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Derive an expression for Ostwald’s dilution law.
2)
Calculate the pH of 1.5\(\times\)10^-3M solution of Ba(OH)₂
3)
The K_a value for HCN is 10^-9. What is the pH of 0.4M HCN solution?
4)
Derive an expression for the hydrolysis constant and degree of hydrolysis of salt of strong acid and weak base.
5)
Calculate the pH of 0.1M CH₃COOH solution. Dissociation constant of acetic acid is \(1.8\times10^{-5}\).

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Define pH.
2)
50ml of 0.05M HNO₃ is added to 50ml of 0.025M KOH. Calculate the pH of the resultant solution.
3)
Calculate the extent of hydrolysis and the pH of 0.1 M ammonium acetate Given that \(K_{a}=K_{b}=1.8\times10^{-5}\)
4)
A solution of 0.10M of a weak electrolyte is found to be dissociated to the extent of 1.20% at 25^oC. Find the dissociation constant of the acid.
5)
Find the pH of a buffer solution containing 0.20 mole per litre sodium acetate and 0.18 mole per litre acetic acid. K_a for acetic acid is \(1.8\times10^{-5}\).

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
For a reaction x + y + z\(\longrightarrow \) products the rate law is given by rate =k[x]^3/2[y]^1/2. What is the overall order of the reaction and what is the order of the reaction with respect to z.
2)
Write Arrhenius equation and explains the terms involved.
3)
Hydrolysis of methyl acetate in aqueous solution has been studied by titrating the liberated acetic acid against sodium hydroxide. The concentration of an ester at different temperatures is given below.

t(min) 0 20 40 60 ∝

v (ml) 20.2 25.6 29.5 32.8 50.4

Show that the reaction is the first order reactions.
4)
Identify the order for the following reactions
(i) Rusting of Iron
(ii) Radioactive disintegration of ₉₂U²³⁸
(iii) 2A+3B⟶ products ;rate = k[A]^1/2[B]²
5)
For the reaction 2x+y ⟶ L find the rate law from the following data.

[x]
(min) [y]
(min) rate
(ms^-1)

0.2 0.02 0.15

0.4 0.02 0.30

0.4 0.08 1.20

t(min)	0	20	40	60	∝
v (ml)	20.2	25.6	29.5	32.8	50.4

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
The decomposition of Cl₂O₇ at 500K in the gas phase to Cl₂ and O₂ is a first order reaction. After 1 minute at 500K, the pressure of Cl₂O₇ falls from 0.08 to 0.04 atm. Calculate the rate constant in s^-1
2)
Explain pseudo first order reaction with an example.
3)
A gas phase reaction has energy of activation 200 kJ mol^-1. If the frequency factor of the reaction is 1.6 x 10¹³s^-1. Calculate the rate constant at 600 K.(e^-40.09= 3.8 x 10^-48)
4)
A first order reaction takes 8 hours for 90% completion. Calculate the time required for 80% completion. (log 5 = 0.6989 ; log10 = 1)
5)
Show that in case of first order reaction, the time required for 99.9% completion is nearly ten times the time required for half completion of the reaction.

12th Standard English Medium Chemistry Subject Solid State Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Write short note on metal excess and metal deficiency defect with an example.
2)
Explain AAAA and ABABA and ABCABC type of three dimensional packing with the help of neat diagram.
3)
Calculate the percentage efficiency of packing in case of body centered cubic crystal.
4)
Experiment shows that Nickel oxide has the formula Ni_0.96.O_1.00. What fraction of Nickel exists as of Ni²⁺ and Ni³+ ions?

12th Standard English Medium Chemistry Subject Solid State Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Explain Schottky defect.
2)
Calculate the number of atoms in a fcc unit cell.
3)
Why ionic crystals are hard and brittle?
4)
What is the two dimensional coordination number of a molecule in square close packed layer?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give one test to differentiate [Co(NH₃)₅Cl]SO₄ and [Co(NH₃)₅SO₄]Cl.
2)
What is linkage isomerism? Explain with an example.
3)
Classify the following ligands based on the number of donor atoms.
a) NH₃
b) en
c) ox^2-
d) pyridine
4)
Write the postulates of Werner’s theory.
5)
Why tetrahedral complexes do not exhibit geometrical isomerism.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give an example for complex of the type [Ma₂b₂c₂] where a, b, c are monodentate ligands and give the possible isomers.
2)
In an octahedral crystal field, draw the figure to show splitting of d orbitals
3)
Write briefly about the applications of coordination compounds in volumetric analysis
4)
Give the difference between double salts and coordination compounds.
5)
[Ni(CN)₄]^2- is diamagnetic, while [NiCl₄]^2- is paramagnetic, explain using crystal field theory.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Explain briefly how +2 states becomes more and more stable in the first half of the first row transition elements with increasing atomic number.
2)
Which is more stable? Fe³⁺ or Fe²⁺? Why ?
3)
Explain the variation in E⁰_{M³⁺/M²⁺} 3d series.
4)
Compare lanthanoids and actinoids.
5)
Explain why Cr²⁺ is strongly reducing while Mn³⁺ is strongly oxidizing.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
What are interstitial compounds?
2)
Calculate the number of unpaired electrons in Ti³⁺ , Mn²⁺ and calculate the spin only magnetic moment.
3)
Write the electronic configuration of Ce⁴⁺ and Co²⁺.
4)
Compare the ionization enthalpies of first series of the transition elements.
5)
Actinoid contraction is greater from element to element than the lanthanoid contraction, why?

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give the uses of sulphuric acid.
2)
Give a reason to support that sulphuric acid is a dehydrating agent.
3)
Write the reason for the anomalous behaviour of Nitrogen.
4)
Write the molecular formula and structural formula for the following molecules.
a) Nitric acid
b) Dinitrogen pentoxide
c) phosphoric acid (PTA)
d) phosphine

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH.
2)
How will you prepare chlorine in the laboratory?
3)
Give the uses of sulphuric acid.
4)
Write the valence shell electronic configuration of group-15 elements.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give the uses of silicones.
2)
AlCl₃behaves like a lewis acid. Substantiate this statement.
3)
Describe the structure of diborane.
4)
Write a short note on hydroboration.
5)
Write a note on metallic nature of p-block elements.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Give the uses of silicones.
2)
Describe the structure of diborane.
3)
Give one example for each of the following
(i) icosogens
(ii) Tetragens
(iii) pnictogens
(iv) chalcogens
4)
Write a note on metallic nature of p-block elements.
5)
Complete the following reactions.
a. \(B(OH)_3 + NH_3\longrightarrow \)
b. \(Na_{ 2 }B_{ 4 }{ O }_{ 7 }+{ { H }_{ 2 }{ SO }_{ 4 }+{ 5H }_{ 2 }O\longrightarrow }\)
c. \({ B }_{ 2 }{ H }_{ 6 }+2NaOH+2{ H }_{ 2 }O\longrightarrow \)
d. \({ B }_{ 2 }{ H }_{ 6 }+6{ CH }_{ 3 }OH\longrightarrow \)
e. \(4{ BF }_{ 3 }+3{ H }_{ 2 }O\longrightarrow \)
f. \(HCOOH+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow \)
g. \(2SiCl_{ 4 }+NH\)₃
h. SiCl₄ + 4C₂H₅OH \(\rightarrow\)
i. 2\(B+6NaOH\longrightarrow \)
j. \({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\ hot }{ \rightarrow } \)

12th Standard English Medium Chemistry Subject Metallurgy Book Back 3 Mark Questions with Solution Part - II - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Explain zone refining process with an example.
2)
Using the Ellingham diagram,
(A) Predict the conditions under which
(i) Aluminium might be expected to reduce magnesia.
(ii) Magnesium could reduce alumina.
(B) it is possible to reduce Fe₂O₃ by coke at a temperature around 1200K
3)
Give the uses of zinc.
4)
Explain the electrometallurgy of aluminium.
5)
Give the basic requirement for vapour phase refining.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 3 Mark Questions with Solution Part - I - by Question Bank Software - Jun 02, 2021 - View & Read

1)
Explain zone refining process with an example.
2)
Using the Ellingham diagram,
(A) Predict the conditions under which
(i) Aluminium might be expected to reduce magnesia.
(ii) Magnesium could reduce alumina.
(B) it is possible to reduce Fe₂O₃ by coke at a temperature around 1200K
3)
Explain the electrometallurgy of aluminium.
4)
Explain the following terms with suitable examples.
(i) Gangue
(ii) slag
5)
Give the basic requirement for vapour phase refining.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Which chemical is responsible for the antiseptic properties of dettol.
2)
What are antibiotics?
3)
Name one substance which can act as both analgesic and antipyretic.
4)
How do antiseptics differ from disinfectants?
5)
What are food preservatives?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Which chemical is responsible for the antiseptic properties of dettol.
2)
What are antibiotics?
3)
Name one substance which can act as both analgesic and antipyretic.
4)
Write a note on synthetic detergents
5)
How do antiseptics differ from disinfectants?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
What type of linkages hold together monomers of DNA?
2)
Give the differences between primary and secondary structure of proteins.
3)
Write the Zwitter ion structure of alanine
4)
Give any three difference between DNA and RNA.
5)
Write a short note on peptide bond.

12th Standard English Medium Chemistry Subject Biomolecules Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
What type of linkages hold together monomers of DNA?
2)
Give the differences between primary and secondary structure of proteins.
3)
Name the Vitamins whose deficiency cause i) rickets ii) scurvy
4)
Write the Zwitter ion structure of alanine
5)
Give any three difference between DNA and RNA.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Write down the possible isomers of the C₄H₉NO₂ give their IUPAC names.
2)
There are two isomers with the formula CH₃NO₂. How will you distinguish between them?
3)
What happens when
i. 2 – Nitropropane boiled with HCl
ii. Nitrobenezene undergo electrolytic reduction in strongly acidic medium.
iii. Oxidation of tert – butylamine with KMnO₄
iv. Oxidation of acetoneoxime with trifluoroperoxy acetic acid
4)
How will you convert nitrobenzene into
i. 1,3,5 - trinitrobenzene
ii. o and p- nitrophenol
iii. m – nitro aniline
iv. azoxybenzene
v. hydrozobenzene
vi. N – phenylhydroxylamine
vii. aniline
5)
Identify compounds A, B and C in the following sequence of reactions.
i) \({ C }_{ 6 }{ H }_{ 5 }NO_{ 2 }\overset { Fe/HCL }{ \longrightarrow } A\overset { HN{ O }_{ 2 } }{ \underset { 273K }{ \longrightarrow } } B\overset { { C }_{ 6 }{ H }_{ 5 }OH }{ \longrightarrow } C\)
ii) \({ C }_{ 6 }{ H }_{ 5 }N_{ 2 }cl\overset { CuCN }{ \longrightarrow } A\overset { H_{ 2 }O/H^{ + } }{ \longrightarrow } B\overset { NH_3 }{ \longrightarrow } C\)
iii) \({ C }{ H }_{ 3 }{ C }{ H }_{ 2 }I\overset { NaCN}{ \longrightarrow } A\overset {OH^-}{ \underset {Partial hydrolysis}{ \longrightarrow } } B\overset {NaOH+Br_2 }{ \longrightarrow } C\)
iv) \({ C }{ H }_{ 3 }NH_{ 2 }\overset { CH_3 Br }{ \longrightarrow } A\overset { CH_{ 3 }COCl}{ \longrightarrow } B\overset { B_2H_6 }{ \longrightarrow } C\)
v) \({ C }_{ 6 }{ H }_{ 5 }NH_{ 2 }\overset { (CH_{ 3 }CO)_{ 2 }O }{ \underset { Pyridine }{ \longrightarrow } } A\overset { HNO_{ 3 } }{ \underset { H_{ 2 }SO_{ 4 },288K }{ \longrightarrow } } B\overset { { H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow C } \)
vi)

vii) \({ C }{ H }_{ 3 }CN_{ 2 }NC\overset { HgO }{ \longrightarrow } A\overset { H_{ 2 }O }{ \longrightarrow } B\overset { i) NaN{ O }_{ 2 }/HCL }{ \underset { ii){ H }_{ 2 }O }{ \longrightarrow } } \)

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
How is propanoic acid is prepared starting from
(a) an alcohol
(b) an alkylhalide
(c) an alkene
2)
A Compound (A) with molecular formula C₂H₃N on acid hydrolysis gives (B) which reacts with thionylchloride to give compound(C). Benzene reacts with compound (C) in presence of anhydrous AlCl₃ to give compound(D). Compound (D) on reduction with Zn/Hg and Conc.HCl gives (E). Identify (A), (B), (C) (D) and (E). Write the equations.
3)
Identify X and Y.
\({ CH }_{ 3 }CO{ CH }_{ 2 }{ CH }_{ 2 }COO{ C }_{ 2 }{ H }_{ 5 }\overset { { CH }_{ 3 }MgBr }{ \longrightarrow } X\overset { { H }_{ 3 }{ O }^{ + } }{ \longrightarrow } Y\)
4)
Identify A, B and C
5)
A hydrocarbon A (molecular formula C₈H₁₀) on ozonolysis gives B (C₄H₆O₂) only. Compound C (C₃H₅Br) on treatment with magnesium in dry ether gives (D) which on treatment with CO₂followed by acidification gives(C). Identify A, B and C.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
State the laws of reflection.
2)
What is angle of deviation due to reflection?
3)
Give the characteristics of image formed by a plane mirror.
4)
Derive the relation between f and R for a spherical mirror.
5)
What are the Cartesian sign conventions for a spherical mirror?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.
2)
Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.
3)
Suggest a suitable reagent to prepare secondary alcohol with identical group using Grignard reagent.
4)
What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Predict the major product, when 2-methyl but -2-ene is converted into an alcohol in each of the following methods.
(i) Acid catalysed hydration
(ii) Hydroboration
(iii) Hydroxylation using Baeyer's reagent
2)
Arrange the following in the increasing order of their boiling point and give a reason for your ordering
(i) Butan – 2- ol, Butan -1-ol, 2 –methylpropan -2-ol
(ii) Propan -1-ol, propan -1,2,3-triol, propan -1,3 – diol, propan -2-ol
3)
Can we use nucelophiles such as NH₃,CH₃O ^- for the Nucleophilic substitution of alcohols
4)
Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Give two important characteristics of physisorption.
2)
Differentiate physisorption and chemisorption.
3)
In case of chemisorption, why adsorption first increases and then decreases with temperature?
4)
Which will be adsorbed more readily on the surface of charcoal and why? NH₃ or CO₂?
5)
Heat of adsorption is greater for chemisorptions than physisorption. Why?

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
In a coagulation experiment 10 mL of a colloid (X) is mixed with distilled water and 0.1M solution of an electrolyte AB so that the volume is 20 mL. It was found that all solutions containing more than 6.6 mL of AB coagulate with in 5 minutes. What is the flocculation values of AB for sol (X)?
2)
The mechanism of Fridel crafts reaction is given below
\({ C }_{ 6 }{ H }_{ 5 }+{ { CH }_{ 3 }Cl\overset { anhydrous\\ \quad { Alcl }_{ 3 } }{ \longrightarrow } }{ C }_{ 6 }{ H }_{ 5 }{ CH }_{ 3 }+HCl\)
3)
Thermal decomposition of KClO₃ in presence of MnO₂ proceeds as follows.
Steps in the reaction 2KClO₃ → 2KCl + 3O₂can be given as
4)
Formation of water due to the reaction of H₂ and O₂ in the presence of Cu proceeds as follows. Steps in the reaction H₂ + 1/2O₂ → H₂O can be given as

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Describe the construction of Daniel cell. Write the cell reaction.
2)
Why is anode in galvanic cell considered to be negative and cathode positive electrode?
3)
Which of 0.1M HCl and 0.1 M KCl do you expect to have greater \(\stackrel{0}{\Lambda}_{\mathrm{m}}\)and why?
4)
A conductivity cell has two platinum electrodes separated by a distance 1.5 cm and the cross sectional area of each electrode is 4.5 sq cm. Using this cell, the resistance of 0.5 N electrolytic solution was measured as 15 Ω. Find the specific conductance of the solution.
5)
Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is 12.04 x 10^-2 Sm^-1.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Define anode and cathode
2)
Why does conductivity of a solution decrease on dilution of the solution.
3)
State Kohlrausch Law. How is it useful to determine the molar conductivity of weak electrolyte at infinite dilution.
4)
Describe the electrolysis of molten NaCl using inert electrodes
5)
The resistance of a conductivity cell is measured as 190 Ω using 0.1M KCl solution (specific conductance of 0.1M KCl is 1.3 Sm^-1). When the same cell is filled with 0.003 M sodium chloride solution, the measured resistance is 6.3KΩ. Both these measurements are made at a particular temperature. Calculate the specific and molar conductance of NaCl solution.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Identify the conjugate acid base pair for the following reaction in aqueous solution
i) HS^- (aq) + HF \(\rightleftharpoons \) F^-(aq) + H₂S(aq)
ii) HPO^2-₄+ SO₃^2- \(\rightleftharpoons \) PO₄^3-+ HSO₃^-
iii) NH₄⁺+ CO₃^2- \(\rightleftharpoons \) NH₃+ HCO₃^-
2)
Account for the acidic nature of HClO₄ in terms of Bronsted – Lowry theory, identify its conjugate base.
3)
When aqueous ammonia is added to CuSO₄ solution, the solution turns deep blue due to the formation of tetra ammine copper (II) complex,\({ [Cu({ H }_{ 2 }O)_4] }_{ (aq) }^{ 2+ }+ 4{ NH }_{ 3 }(aq)\rightleftharpoons { [Cu{ ({ NH }_{ 3 }) }_{ 4 }] }_{ (aq) }^{ 2+ }\) among H₂O and NH₃ Which is stronger Lewis base.
4)
The concentration of hydroxide ion in a water sample is found to be 2.5 × 10^-6M. Identify the nature of the solution.
5)
A lab assistant prepared a solution by adding a calculated quantity of HCl gas 25⁰C to get a solution with [H₃O⁺] = 4\(\times\)10^-5M. Is the solution neutral (or) acidic (or) basic.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
What are Lewis acids and bases? Give two example for each.
2)
Discuss the Lowry – Bronsted concept of acids and bases.
3)
Calculate the concentration of OH^- in a fruit juice which contains \(2\times10^{-3}\) M, H₃O⁺ ion. Identify the nature of the solution.
4)
Calculate the pH of 0.001M HCl solution
5)
Calculate pH of 10^-7M HCl

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Define half life of a reaction. Show that for a first order reaction half life is independent of initial concentration.
2)
What is an elementary reaction? Give the differences between order and molecularity of a reaction.
3)
Explain the rate determining step with an example.
4)
Describe the graphical representation of first order reaction.
5)
Write the rate law for the following reactions.
(a) A reaction that is 3/2 order in x and zero order in y.
(b) A reaction that is second order in NO and first order in Br₂.

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Define average rate and instantaneous rate.
2)
Define rate law and rate constant.
3)
Derive integrated rate law for a zero order reaction A\(\longrightarrow \) product.
4)
What is the order with respect to each of the reactant and overall order of the following reactions?
a) 5Br^-_(aq)+BrO₃^-_(aq)+6H⁺_(aq) ➝3Br_2(l)+3H₂O_(l)
The experimental rate law is Rate = k [Br⁻][BrO₃⁻][H⁺]²
b) CH₃CHO_(g)\(\overset { \Delta }{ \longrightarrow } \) CH_4(g)+CO_(g) the experimental rate law is
Rate =K[CH₃CHO]^{\(\frac{3}{2}\)}
5)
The rate of the reaction X + 2y→ product is 4 x 10^-3 mol L^-1S^-1, if [X] = [Y] = 0.2M and rate constant at 400K is 2 x 10^-2s^-1, What is the overall order of the reaction.

12th Standard English Medium Chemistry Subject Solid State Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Explain briefly seven types of unit cell.
2)
Distinguish between hexagonal close packing and cubic close packing.
3)
Distinguish tetrahedral and octahedral voids.
4)
What are point defects?

12th Standard English Medium Chemistry Subject Solid State Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Explain briefly seven types of unit cell.
2)
Distinguish between hexagonal close packing and cubic close packing.
3)
Distinguish tetrahedral and octahedral voids.
4)
What are point defects?

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Ni²⁺ is identified using alcoholic solution of dimethyl glyoxime. Write the structural formula for the rosy red precipitate of a complex formed in the reaction.
2)
[CuCl₄]^2- exists while [Cul₄]^2- does not exist why?
3)
Calculate the ratio of \(\frac { \left[ { Ag }^{ + } \right] }{ \left[ Ag\left( NH_{ 3 } \right) _{ 2 } \right] ^{ + } } \) in 0.2 M solution of NH_3. If the stability constant for the complex \([Ag(NH_{ 3 })_{ 2 }]^{ + }\) is 1.7 x 10⁷
4)
Give an example of coordination compound used in medicine and two examples of biologically important coordination compounds.
5)
Based on VB theory explain why [Cr(NH₃)₆]³⁺ is paramagnetic, while [Ni(CN)₄]^2- is diamagnetic.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Write the IUPAC names for the following complexes.
2)
Write the formula for the co-ordination compounds.
3)
Arrange the following in order of increasing molar conductivity
(i) Mg[Cr(NH₃)(Cl)₅]
(ii) Cr(NH₃)₅Cl]₃[CoF₆]₂
(iii) [Cr(NH₃)₃Cl₃]
4)
Draw all possible geometrical isomers of the complex [Co(en)₂Cl₂]⁺ and identify the optically active isomer.
5)
[Ti(H₂O)₆]³⁺ is coloured, while [Sc(H₂O)₆]³⁺ is colourless- explain.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
What are inner transition elements?
2)
Justify the position of lanthanoids and actinoids in the periodic table.
3)
What are actinides? Give three examples.
4)
Why Gd³⁺ is colourless?
5)
Explain why compounds of Cu²⁺ are coloured but those of Zn²+ are colourless.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
What are transition metals? Give four examples.
2)
Explain the oxidation states of 4d series elements.
3)
Describe the preparation of potassium dichromate.
4)
What is lanthanoid contraction and what are the effects of lanthanoid contraction?
5)
Complete the following.
a. 3MnO₄^2- + 4H⁺ ⟶?
b. C₆H₅CH₃ \(\overset { acidified }{ \underset { KMnO_{ 4 } }{ \longrightarrow } } \)?
c. MnO₄^- + Fe²⁺ ⟶?
d. KMnO₄ \(\overset { \triangle }{ \underset { Red\ hot }{ \longrightarrow } } \) ?
e. Cr₂O₇^2- + 6I^- + 14H⁺ ⟶?
f. Na₂Cr₂O₇ + 2KCl ⟶?

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
What is inert pair effect?
2)
Chalcogens belongs to p-block. Give reason.
3)
Explain why fluorine always exhibit an oxidation state of -1?
4)
What are interhalogen compounds? Give examples.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Give the oxidation state of halogen in the following.
a) OF₂
b) O₂F₂
c) Cl₂O₃
d) I₂O₄
2)
Why fluorine is more reactive than other halogens?
3)
Give the uses of helium.
4)
What is the hybridisation of iodine in IF₇? Give its structure.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Describe briefly allotropism in p- block elements with specific reference to carbon.
2)
Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF₃.
3)
Give the uses of Borax
4)
What is catenation ? describe briefly the catenation property of carbon.
5)
Write a note on Fisher tropsch synthesis.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Write a short note on anomalous properties of the first element of p-block.
2)
Describe briefly allotropism in p- block elements with specific reference to carbon.
3)
Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF₃.
4)
Write a note on Fisher tropsch synthesis.
5)
Give the structure of CO and CO₂.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 2 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
What are the differences between minerals and ores?
2)
What are the various steps involved in the extraction of pure metals from their ores?
3)
Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.
4)
Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?
5)
Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 2 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
What are the differences between minerals and ores?
2)
What is the role of quick lime in the extraction of Iron from its oxide Fe₂O₃?
3)
Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.
4)
Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?
5)
Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
An example of anti-fertility drug is ____________.
2)
The drug used to induce sleep is _______________.
3)
Which of the following is a co-polymer?
4)
The polymer used in making blankets (artificial wool) is _______.
5)
Regarding cross-linked or network polymers, which of the following statement is incorrect?

12th Standard English Medium Chemistry Subject Chemistry In Everyday Life Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statement is not true.
2)
Saccharin, an artificial sweetener is manufactured from ____________.
3)
Drugs that bind to the receptor site and inhibit its natural function are called _______.
4)
Aspirin is a/an _______.
5)
Which is the monomer of neoprene in the following?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Which of the following vitamins is water soluble?
2)
Which of the following statement is correct?
3)
If one strand of the DNA has the sequence ‘ATGCTTGA’, then the sequence of complementary strand would be ______.
4)
α -D (+) Glucose and β-D (+) glucose are ______.
5)
Which of the following amino acids are achiral?

12th Standard English Medium Chemistry Subject Biomolecules Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
The correct corresponding order of names of four aldoses with configuration given below Respectively is ______.
2)
\(\text { Glucose } \stackrel{(\mathrm{HCN})}{\longrightarrow} \text { Product } \stackrel{(\text { hydrolysis })}{\longrightarrow} \text { Product } \stackrel{(\mathrm{HI}+\text { Heat })}{\longrightarrow} \mathrm{A}\) , the compound A is______.
3)
The central dogma of molecular genetics states that the genetic information flows from______.
4)
Among the following the achiral amino acid is ______.
5)
In aqueous solution of amino acids mostly exists in ______.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
_______.
2)
IUPAC name for the amine
3)
P Product ‘P’ in the above reaction is _______.
4)
Identify X in the sequence give below
5)
Among the following, the reaction that proceeds through an electrophilic substitution is : _______.

12th Standard English Medium Chemistry Subject Organic Nitrogen Compounds Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Which one of the following will not undergo Hofmann bromamide reaction.
2)
Assertion: Acetamide on reaction with KOH and bromine gives acetic acid
Reason: Bromine catalyses hydrolysis of acetamide.
Codes:
a) if both assertion and reason are true and reason is the correct explanation of assertion.
b) if both assertion and reason are true but reason is not the correct explanation of assertion.
c) assertion is true but reason is false
d) both assertion and reason are false.
3)
CH₃CH₂ Br \(\overset { aqNaOH }{ \underset { \Delta }{ \longrightarrow } } A\overset { { KMnO }_{ 4 }{ /H }^{ + } }{ \underset { \Delta }{ \longrightarrow } } B\overset { { NH }_{ 3 } }{ \underset { \Delta }{ \longrightarrow } } C\overset { { Br }_{ 2 }/NaOH }{ \longrightarrow } D\) D' is________.
4)
Which one of the following nitro compounds does not react with nitrous acid.
5)
Aniline + benzoylchloride \(\overset { NaOH }{ \longrightarrow } \)C₆H₅ - NH - COC₆ H₅ this reaction is known as ______.

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Phenyl methanal is reacted with concentrated NaOH to give two products X and Y. X reacts with metallic sodium to liberate hydrogen X and Y are ________.
2)
In which of the following reactions new carbon – carbon bond is not formed?
3)
An alkene “A” on reaction with O₃ and Zn - H₂O gives propanone and ethanol in equimolar ratio. Addition of HCl to alkene “A” gives “B” as the major product. The structure of product “B” is ______.
4)
Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their ________.
5)
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

12th Standard English Medium Chemistry Subject Carbonyl Compounds Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
The correct structure of the product ‘A’ formed in the reaction ______.
2)
Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _______.
3)
In the following reaction, \(HC\equiv CH \overset { { H }_{ 2 }{ SO }_{ 4 } }{ \underset { HgS{ O }_{ 4 } }{ \longrightarrow } } X\) Product ‘X’ will not give _______.
4)
\({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.
5)
Predict the product Z in the following series of reactions Ethanoic acid \(\overset { { PCI }_{ 5 } }{ \longrightarrow } X\overset { { C }_{ 6 }{ H }_{ 6 } }{ \underset { Anhydrous \ AlCI }-_{3}{ \longrightarrow } } Y\overset { 1){ CH }_{ 3 }MgBr }{ \underset { II){ H }_{ 3 }{ O }^{ + } }{ \longrightarrow } } Z.\)

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
HO CH₂ CH₂ – OH on heating with periodic acid gives ______.
2)
Which of the following compound can be used as antifreeze in automobile rediators?
3)
The reactions
is an example of ______.
4)
One mole of an organic compound (A) with the formula C₃H₈O reacts completely with two moles of HI to form X and Y. When Y is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound (A) is ______.
5)
Among the following ethers which one will produce methyl alcohol on treatment with hot HI?

12th Standard English Medium Chemistry Subject Hydroxy Compounds and Ethers Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
The X is _______.
2)
In the reaction sequence, Ethane \(\overset { HOCl }{ \longrightarrow } A\overset { x }{ \longrightarrow } \) ethan -1, 2 - diol. A and X respectively are ________.
3)
Which one of the following is the strongest acid.
4)
on treatment with Con H₂SO₄, predominately gives______.
5)
Carbolic acid is _____.

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Which one of the is not a surfactant?
2)
The phenomenon observed when a beam of light is passed through a colloidal solution is_______.
3)
In an electrical field, the particles of a colloidal system move towards cathode. The coagulation of the same sol is studied using K₂SO₄
(i), Na₃ PO₄
(ii), K₄ [Fe(CN)₆]
(iii) and NaCl
(iv) Their coagulating power should be
4)
Collodion is a 4% solution of which one of the following compounds in alcohol – ether mixture?
5)
Which one of the following is an example for homogeneous catalysis?

12th Standard English Medium Chemistry Subject Surface Chemistry Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Statement : To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?
2)
Hair cream is _____.
3)
Which one of the following is correctly matched?
4)
The most effective electrolyte for the coagulation of As₂S₃Sol is _______.
5)
Which one of the is not a surfactant?

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
In the electrochemical cell: Zn|ZnSO₄ _(0.01M)|| CuSO₄ _(1.0M)|Cu, the emf of this Daniel cell is E₁. When the concentration of ZnSO₄ is changed to 1.0M and that CuSO₄ changed to 0.01M, the emf changes to E₂. From the above, which one is the relationship between E₁ and E₂?
2)
Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below:
\({ BrO }_{ 4 }^{ - }\overset { 1.82V }{ \longrightarrow } { BrO }_{ 3 }^{ - }\overset { 1.5V }{ \longrightarrow } HBrO\overset { 1.595v }{ \longrightarrow } { Br }_{ 2 }\overset { 1.0652V }{ \longrightarrow } Br^{ - }\)
Then the species undergoing disproportional is
3)
For the cell reaction
2Fe³⁺(aq) + 2l⁻(aq) \(\rightarrow\)2Fe²⁺ (aq) + 1₂ (aq)
E^o_cell= 0.24V = at 298K. The standard Gibbs energy (Δ, G^o) of the cell reactions is:
4)
A certain current liberated 0.504gm of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution ______.
5)
A gas X at 1 atm is bubbled through a solution containing a mixture of 1MY^-and 1MZ^- at 25^oC. If the reduction potential of Z>Y>X, then_____.

12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)

Electrolyte KCl KNO₃ HCl NaOAC NaCl

Λ_-
(Scm² mol^-1) 149.9 145.0 426.2 91.0 126.5

Calculate Λ^o_HoAC using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25^oC_______.
2)
Faraday constant is defined as_______.
3)
How many faradays of electricity are required for the following reaction to occur MnO₄^-→ Mn²⁺
4)
A current strength of 3.86 A was passed through molten Calcium oxide for 41 minutes and 40 seconds. The mass of Calcium in grams deposited at the cathode is_______. (atomic mass of Ca is 40g / mol and 1F = 96500C).
5)
During electrolysis of molten sodium chloride, the time required to produce 0.1mole of chlorine gas using a current of 3A is _____.

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
H₂PO₄^- the conjugate base of _______.
2)
Which of the following can act as Lowery – Bronsted acid well as base?
3)
The pH of an aqueous solution is Zero. The solution is _______.
4)
The hydrogen ion concentration of a buffer solution consisting of a weak acid and its salts is given by _______.
5)
Which of the following relation is correct for degree of hydrolysis of ammonium acetate?

12th Standard English Medium Chemistry Subject Ionic Equilibrium Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
The solubility of BaSO₄ in water is 2.42 × 10^-3gL^-1 at 298K. The value of its solubility product(K_sp) will be (Given molar mass of BaSO₄ =233g mol^-1)
2)
pH of a saturated solution of Ca(OH)₂ is 9. The Solubility product (K_sp) of Ca(OH)₂ _______.
3)
Conjugate base for Bronsted acids H₂O and HF are _______.
4)
Which will make basic buffer?
5)
Which of the following fluro compounds is most likely to behave as a Lewis base?

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
In a homogeneous reaction A⟶B+C+D, the initial pressure was P₀ and after time t it was P expression for rate constant in terms of P₀, P and t will be _____.
2)
If 75% of a first order reaction was completed in 60 minutes, 50% of the same reaction under the same conditions would be completed in_______.
3)
The correct difference between first and second order reactions is that________.
4)
After 2 hours, a radioactive substance becomes \(\left( \frac { 1 }{ 16 } \right) ^{ th }\) of original amount Then the half life (in min) is _______.
5)
This reaction follows first order kinetics. The rate constant at particular temperature is 2.303 x 10^-2 hour^-1. The initial concentration of cyclopropane is 0.25 M. What will be the concentration of cyclopropane after 1806 minutes? (log 2 = 0.3010)

12th Standard English Medium Chemistry Subject Chemical Kinetics Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
For a first order reaction A ⟶ B the rate constant is x min⁻¹. If the initial concentration of A is 0.01M, the concentration of A after one hour is given by the expression.
2)
Among the following graphs showing variation of rate constant with temperature (T) for a reaction, the one that exhibits Arrhenius behavior over the entire temperature range is _______.
3)
For the reaction, 2NH₃ ⟶ N₂ + 3H₂, if \(\frac { -d[NH_{ 3 }] }{ dt } \) = k₁[NH₃], \(\frac { d[N_{ 2 }] }{ dt } =k_{ 2 }[NH_{ 3 }],\frac { d[{ H }_{ 2 }] }{ dt } \)= k₃[NH₃] then the relation between k₁, k₂ and k₃ is _________.
4)
For a reaction Rate = k[acetone]^3/2 then unit of rate constant and rate of reaction respectively is _______.
5)
Consider the following statements:
(i) increase in concentration of the reactant increases the rate of a zero order reaction.
(ii) rate constant k is equal to collision frequency A if E_a = 0
(iii) rate constant k is equal to collision frequency A if E_a = ∞
(iv) a plot of ln (k) vs T is a straight line.
(v) a plot of ln (k) vs \(\left( \frac { 1 }{ T } \right) \) is a straight line with a positive slope.
Correct statements are

12th Standard English Medium Chemistry Subject Solid State Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
If ‘a’ is the length of the side of the cube, the distance between the body centered atom and one corner atom in the cube will be_________.
2)
Potassium has a bcc structure with nearest neighbor distance 4.52 \(\overset{o}{A}\). Its atomic weight is 39. its density will be_______.
3)
Schottky defect in a crystal is observed when ______.
4)
Assertion: due to Frenkel defect, density of the crystalline solid decreases.
Reason: In Frenkel defect cation and anion leaves the crystal.
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion
b) Both assertion and reason are true but reason is not the correct explanation of assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false
5)
A two dimensional solid pattern formed by two different atoms X and Y is shown below. The black and white squares represent atoms X and Y respectively. The simplest formula for the compound based on the unit cell from the pattern is _______.

12th Standard English Medium Chemistry Subject Solid State Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Graphite and diamond are ________.
2)
An ionic compound A_x B_y crystallizes in fcc type crystal structure with B ions at the centre of each face and A ion occupying corners of the cube the correct formula of A_x,B_y is ________.
3)
The ratio of close packed atoms to tetrahedral hole in cubic packing is ________.
4)
Solid CO₂ is an example of ________.
5)
Assertion: monoclinic sulphur is an example of monoclinic crystal system
Reason: for a monoclinic system, \(a\neq b\neq c\) and \(\alpha =\gamma ={ 90 }^{ 0 },\beta \neq { 90 }^{ 0 }\)
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion
b) Both assertion and reason are true but reason is not the correct explanation of assertion.
c) Assertion is true but reason is false.
d) Both assertion and reason are false.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
A complex in which the oxidation number of the metal is zero is_______.
2)
Formula of tris(ethane-1, 2-diamine)iron(II)phosphate _______.
3)
Which of the following is paramagnetic in nature?
4)
Fac-mer isomerism is shown by _______.
5)
Choose the correct statement.

12th Standard English Medium Chemistry Subject Coordination Chemistry Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
An excess of silver nitrate is added to 100ml of a 0.01M solution of Pentaaquachlorochromium (III)chloride. The number of moles of AgCl precipitated would be _______.
2)
A complex has a molecular formula MSO₄Cl.6H₂O. The aqueous solution of it gives white precipitate with Barium chloride solution and no precipitate is obtained when it is treated with silver nitrate solution. If the secondary valence of the metal is six, which one of the following correctly represents the complex?
3)
Oxidation state of Iron and the charge on the ligand NO in [Fe(H₂O)₅NO]SO₄ are_______.
4)
As per IUPAC guidelines, the name of the complex [Co(en)₂(ONO)Cl]Cl is _______.
5)
IUPAC name of the complex K₃[Al(C₂O₄)₃] is _______.

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
The number of moles of acidified KMnO₄required to oxidize 1 mole of ferrous oxalate(FeC₂O₄) is _______.
2)
When a brown compound of Mn (A) is treated with HCl, it gives a gas (B). The gas (B) taken in excess reacts with NH₃ to give an explosive compound (C). The compound A, B and C are ________.
3)
Which one of the following statements related to lanthanons is incorrect?
4)
Which of the following lanthanoid ions is diamagnetic?
5)
Which of the following oxidation states is most common among the lanthanoids?

12th Standard English Medium Chemistry Subject Transition and Inner Transition Elements Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
The alloy of copper that contain Zinc is________.
2)
Which of the following does not give oxygen on heating?
3)
In acid medium, potassium permanganate oxidizes oxalic acid to _______.
4)
Which of the following statements is not true?
5)
Permanganate ion changes to ________ in acidic medium.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
An element belongs to group 15 and 3^rdperiod of the periodic table, its electronic configuration would be_______.
2)
Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.
3)
In the brown ring test, brown colour of the ring is due to _______.
4)
On hydrolysis, PCl₃ gives________.
5)
P₄O₆ reacts with cold water to give _______.

12th Standard English Medium Chemistry Subject p - Block Elements - II Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Which is true regarding nitrogen?
2)
Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.
3)
On hydrolysis, PCl₃ gives________.
4)
The basicity of pyrophosphorous acid ( H₄P₂O₅) is _______.
5)
Assertion: Bond dissociation energy of fluorine is greater than chlorine gas
Reason: Chlorine has more electronic repulsion than fluorine.
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion.
b) Both assertion and reason are true but reason is not the correct explanation of assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Which of the following is not sp² hybridised?
2)
Which of the following statements is not correct?

3)

Column-I		Column-II
A	Borazole	1	B(OH)₃
B	Boric acid	2	B₃N₃H₆
C	Quartz	3	Na₂[B₄O₅(OH)₄]8H₂O
D	Borax	4	SiO₂

4)
Thermodynamically the most stable form of carbon is________.
5)
The stability of +1 oxidation state increases in the sequence ________.

12th Standard English Medium Chemistry Subject p - Block Elements - I Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
An aqueous solution of borax is________.
2)
Which among the following is not a borane?
3)
In diborane, the number of electrons that accounts for banana bonds is ________.
4)
Carbon atoms in fullerene with formula C₆₀have _______hybridisation.
5)
The basic structural unit of silicates is _______.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 1 Mark Questions with Solution Part - II - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Which one of the following ores is best concentrated by froth – floatation method?
2)
Zinc is obtained from ZnO by________.
3)
Extraction of gold and silver involves leaching with cyanide ion. silver is later recovered by_______.
4)
The following set of reactions are used in refining Zirconium
\(Zr \text{(impure)}+2I_{ 2 }\overset { 523k }{ \longrightarrow } ZrI_{ 4 }\)
\({ ZrI }_{ 4 }\overset { 1800K }{ \longrightarrow } Zr \text{(pure)}+{ 2I }_{ 2 }\)This method is known as ______.
5)
The incorrect statement among the following is______.

12th Standard English Medium Chemistry Subject Metallurgy Book Back 1 Mark Questions with Solution Part - I - by Question Bank Software - Jun 01, 2021 - View & Read

1)
Bauxite has the composition ______.
2)
Which one of the following reaction represents calcinations?
3)
Which of the metal is extracted by Hall-Heroult process?

4)

Match items in column - I with the items of column – II and assign the correct code.

Column-I		Column-II
A.	Cyanide process	(i)	Ultrapure Ge
B	Froth floatation process	(ii)	Dressing of ZnS
C	Electrolytic reduction	(iii)	Extraction of Al
D	Zone refining	(iv)	Extraction of Au
		(v)	Purification of Ni

5)
Which one of the following is not feasible

Stateboard 12th Standard Chemistry Subject English Medium Public Answer Key - March 2020 - by QB Admin - May 18, 2021 - View & Read

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Stateboard 12th Standard Chemistry Subject Public Question Paper - March 2020 - by QB Admin - May 18, 2021 - View & Read

Stateboard 12th Standard Chemistry Subject Public Question Paper - March 2019 - by QB Admin - May 18, 2021 - View & Read

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12th Standard Chemistry English Medium Metallurgy Important Questions - by Question Bank Software - Apr 23, 2021 - View & Read

1)
Which of the metal is extracted by Hall-Heroult process?
2)
Which of the following is not true with respect to Ellingham diagram?
3)
Concentration of copper glance is done by________.
4)
Steel is an alloy of___________
5)
Which of these is not a monomer for a high molecular mass silicone polymer?

Electrolyte	KCl	KNO₃	HCl	NaOAC	NaCl
Λ_- (Scm² mol^-1)	149.9	145.0	426.2	91.0	126.5

[x] (min)	[y] (min)	rate (ms^-1)
0.2	0.02	0.15
0.4	0.02	0.30
0.4	0.08	1.20

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