The incorrect statement among the following is______.

(a)

Nickel is refined by Mond’s process

(b)

Titanium is refined by Van Arkel’s process

(c)

Zinc blende is concentrated by froth floatation

(d)

In the metallurgy of gold, the metal is leached with dilute sodium chloride solution

Which of the following plot gives Ellingham diagram

(a)

\(\Delta S \ \text{Vs} \ T\)

(b)

\(\Delta { G }^{ 0 }\ \text{Vs} \ T\)

(c)

\(\Delta { G }^{ 0 }\ \text{Vs} \ \frac { 1 }{ T } \)

(d)

\(\Delta { G }^{ 0 }\ \text{Vs} \ { T }^{ 2 }\)

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with________.

(a)

Iron sulphide (FeS)

(b)

Carbon monoxide (CO)

(c)

Copper (I) sulphide (Cu₂S)

(d)

Sulphur dioxide (SO₂)

Concentration of copper glance is done by________.

(a)

leaching

(b)

magnetic separation

(c)

froth flotation

(d)

hydraulic washing

Froth flotation process is suitable for concentrating ______ores.

(a)

oxide

(b)

carbonate

(c)

sulphide

(d)

halide

Carbon atoms in fullerene with formula C₆₀ have _______hybridisation.

(a)

sp³ hybridised

(b)

sp hybridised

(c)

sp² hybridised

(d)

partially sp² and partially sp³ hybridised

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

(a)

A	B	C	D
2	1	4	3

(b)

A	B	C	D
1	2	4	3

(c)

A	B	C	D
1	2	4	3

(d)

None of these

Select the incorrect statement regarding B₂H₆.

(a)

It contains B-B ionic bond

(b)

Each boron is Sp³ hybridised

(c)

It has two types of hydrogen bonds

(d)

it is used as a reducing agent

Graphite has _______.

(a)

2-d sheet structure

(b)

Vander waals force between successive layers of carbon sheets

(c)

Sp² hybridised carbon linked with other three carbon atoms in hexagonal planar structure

(d)

all the above

Silicones are ______.

(a)

ortho silicates

(b)

water repellent thermal insulators

(c)

both (a) and (b)

(d)

None of these

The basicity of pyrophosphorous acid ( H₄P₂O₅) is _______.

(a)

4

(b)

2

(c)

3

(d)

5

When copper is heated with conc HNO₃ it produces ________.

(a)

Cu(NO₃)₂, NO and NO₂

(b)

Cu(NO₃)₂ and N₂O

(c)

Cu(NO₃)₂ and NO₂

(d)

Cu(NO₃)₂ and NO

Catenation property of group 15 elements, follow the order _______.

(a)

N < P < As < Sb < Bi

(b)

P >> N > As > Sb > Bi

(c)

P < N < As < Sb < Bi

(d)

N>> P > As > Sb > Bi

Pick the wrong one among the following

(a)

F₂ - Yellow

(b)

Br₂ - Red

(c)

Cl₂ - Colourless

(d)

I₂- Violet

Oxalic acid on heating with cone H₂SO₄ gives ______.

(a)

CO only

(b)

CO₂ only

(c)

CO₂ + H₂O

(d)

CO + CO₂ + H₂O

Which of the following statements is not true?

(a)

on passing H₂S, through acidified K₂Cr₂O₇ solution, a milky colour is observed

(b)

Na₂Cr₂O₇ is preferred over K₂Cr₂O₇ in volumetric analysis

(c)

K₂Cr₂O₇ solution in acidic medium is orange in colour

(d)

K₂Cr₂O₇ solution becomes yellow on increasing the P^H beyond 7

A white crystalline salt (A) react with dilute HCl to liberate a suffocating gas (B) and also forms a yellow precipitate. The gas (B) turns potassium dichromate acidified with dil H₂SO₄ to a green coloured solution(C).  A, B and C are respectively ________.

(a)

Na₂SO₃, SO₂, Cr₂(SO₄)₃

(b)

Na₂S₂O₃, SO₂, Cr₂(SO₄)₃

(c)

Na₂S, SO₂, Cr₂(SO₄)₃

(d)

Na₂SO₄, SO₂, Cr₂(SO₄)₃

On oxidation with KMnO₄ in acidic medium, SO₂ is oxidised to _______.

(a)

SO₂

(b)

H₂SO₄

(c)

SO₃^2-

(d)

H₂S

Acidified solution of chromic acid on treatment with H₂O₂ give blue colour which is due to _______.

(a)

CrO₃ + H₂O + O₂

(b)

H₂Cr₂O₇+ H₂O + CO₂

(c)

Cr₂O₃ + H₂O + O₂

(d)

CrO₅ + H₂O

_________ is known as Bayer's reagent.

(a)

Hot dilute alkaline KMnO₄

(b)

Cold dilute alkaline KMnO₄

(c)

Hot Conc. acidic KMnO₄

(d)

Cold Conc. acidic KMnO₄

Which type of isomerism is exhibited by [Pt(NH₃)₂Cl₂]?

(a)

Coordination isomerism

(b)

Linkage isomerism

(c)

Optical isomerism

(d)

Geometrical isomerism

Which one of the following complexes is not expected to exhibit isomerism?

(a)

[Ni(NH₃)₄(H₂O)₂]²⁺

(b)

[Pt(NH₃)₂Cl₂]

(c)

[Co(NH₃)₅SO₄]Cl

(d)

[FeCl₆]^3-

The coordination polyhedron of the complex [Cr(H₂O)₆]CI₃ is________.

(a)

square planar

(b)

tetrahedral

(c)

trigonal

(d)

octahedral

______is used as an antitumor drug in cancer treatment.

(a)

Ca - EDTA

(b)

Cis - platin

(c)

Sodium thio sulphate

(d)

Nickel chloride

Phthalo blue - a bright blue figment is a complex of _______.

(a)

Copper (I) ion

(b)

Copper (II) ion

(c)

Nickel (II) ion

(d)

Nickel (IV) ion

The radius of an atom is 300pm, if it crystallizes in a face centered cubic lattice, the length of the edge of the unit cell is ________.

(a)

488.5pm

(b)

848.5pm

(c)

884.5pm

(d)

484.5pm

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

(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

Which of the following features is false regarding the structure of CsCI?

(a)

It has bee arrangements

(b)

Co-ordination number for each ion is 8

(c)

Number of atoms in a unit cell is 4

(d)

The radius ratio (r₊/r_-) is 0.93

Which among the following is an amorphous solid?

(a)

Graphite

(b)

SiO₂

(c)

Sic

(d)

Diamond

The coordination number of ZnS is _______.

(a)

3

(b)

4

(c)

6

(d)

8

After 2 hours, a radioactive substance becomes \(\left( \frac { 1 }{ 16 } \right) ^{ th }\) of original amount Then the half life (in min) is _______.

(a)

60 minutes

(b)

120 minutes

(c)

30 minutes

(d)

15 minutes

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)

(a)

0.125 M

(b)

0.215 M

(c)

0.25 x 2.303 M

(d)

0.05 M

(a)

It is a 2 steps reaction, step 1 is slower than step 2

(b)

It is a 2 steps reaction, step 2 is slower than step 1.

(c)

Single step reaction where B is a activated complex

(d)

Single step reaction in which B is a reaction intermediate.

The graph between the log K versus \(\frac { 1 }{ T } \) is a straight line. The slope of the line is______.

(a)

\(\frac { -2.303R }{ Ea } \)

(b)

\(\frac { Ea }{ 2.303R } \)

(c)

\(\frac { 2.303R }{ Ea } \)

(d)

\(\frac { Ea }{ 2.303R } \)

For a general reaction aA + bB ⟶Products, the rate of the reaction is equal to______.

(a)

k[A]^p [B]^q

(b)

k [A] [B]

(c)

k

(d)

\(\frac { 1 }{ k } \)

Which of these is not likely to act as Lewis base?

(a)

BF₃

(b)

PF₃

(c)

CO

(d)

F^–

The pH of an aqueous solution is Zero. The solution is _______.

(a)

slightly acidic

(b)

strongly acidic

(c)

neutral

(d)

basic

HCl is a strong acid since _______.

(a)

It can be easily oxidised

(b)

It can be easily ionised

(c)

It dissociates completely to give H⁺ ions in solution

(d)

It can be easily oxidised and It can be easily ionised

The pH of a solution containing 0.1 N NaOH solution is _______.

(a)

1

(b)

10^-1

(c)

13

(d)

10^-13

According to Lowry - Bronsted theory, an acid is a _________.

(a)

electron donor

(b)

electron acceptor

(c)

proton donor

(d)

prof on acceptor

Among the following cells
I) Leclanche cell
II) Nickel – Cadmium cell
III) Lead storage battery
IV) Mercury cell
Primary cells are ____.

(a)

I and IV

(b)

I and III

(c)

III and IV

(d)

II and III

In the electrochemical cell: Zn|ZnSO_{4 (0.01M)}|| CuSO_{4 (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?

(a)

E₁ < E₂

(b)

E₁ > E₂

(c)

E₂ ≥ E₁

(d)

E₁ = E₂

The equivalent conductivity of CH₃COOH at 25°C is 80 ohm^-1 cm² eq^-1 and at infinite dilution 400 ohm^-1 cm^-1 eq^-1. The degree of dissociation of CH₃COOH is ______.

(a)

1

(b)

0.2

(c)

0.1

(d)

0.3

1 mho is equal to ______.

(a)

1 siemen

(b)

1 second

(c)

1 ohm

(d)

none of the above

Low molar conductivity at high concentration is due to _______.

(a)

High attractive force between oppositely charged ions

(b)

Viscous drag due to greater solvation

(c)

Both High attractive force between oppositely charged ions and Viscous drag due to greater solvation

(d)

Neither High attractive force between oppositely charged ions and Viscous drag due to greater solvation

Which one of the following characteristics are associated with adsorption?

(a)

\(\Delta\)G and \(\Delta\)H are negative but \(\Delta\)S is positive

(b)

\(\Delta\)G and \(\Delta\)S are negative but \(\Delta\)H is positive

(c)

\(\Delta\)G is negative but \(\Delta\)H and \(\Delta\)S are positive

(d)

\(\Delta\)G, \(\Delta\)H and \(\Delta\)S all are negative.

Adsorption of a gas on solid metal surface is spontaneous and exothermic, then ______.

(a)

ΔH increases

(b)

ΔS increases

(c)

ΔG increases

(d)

ΔS decreases

_______ is a measure of protecting power of a colloid.

(a)

Colloid number

(b)

Coagulation number

(c)

Gold number

(d)

Sol number

Butter and cream are examples of________type of emulsion.

(a)

O/O

(b)

O/W

(c)

W/W

(d)

W/O

The process of hardening of leather is called _______.

(a)

coagulation

(b)

tanning

(c)

centrifuging

(d)

stabilization

Which one of the following is the strongest acid.

(a)

2 - nitrophenol

(b)

4 – chlorophenol

(c)

4– nitrophenol

(d)

3 – nitrophenol

Williamson synthesis of preparing dimethyl ether is a / an  ______.

(a)

SN¹ reactions

(b)

SN² reaction

(c)

electrophilic addition

(d)

electrophilic substitution

The compound that acts as a solvent for Grignard reagent is ______.

(a)

Ethyl alcohol

(b)

Diethyl ether

(c)

Acetone

(d)

Benzene

Ethers are insoluble in water due to the ______.

(a)

absence of co-ordinate bond

(b)

presence of co-ordinate bond

(c)

absence of H - bond

(d)

presence of H - bond

The ether used in perfumery is ________.

(a)

diethyl ether

(b)

dimethyl ether

(c)

methyl phenyl ether

(d)

diphenyl ether

Benzoic acid \(\overset { i){ NH }_{ 3 } }{ \underset { ii)\Delta }{ \longrightarrow } } A\overset { NaOBr }{ \longrightarrow } B\overset { NaN{ O }_{ 2 }/HCl }{ \longrightarrow } \) C 'C'  is ______.

(a)

anilinium chloride

(b)

O – nitro aniline

(c)

benzene diazonium chloride

(d)

m– nitro benzoic acid

The reagent used to distinguish between acetaldehyde and benzaldehyde is _______.

(a)

Tollens reagent

(b)

Fehling’s solution

(c)

2,4 – dinitrophenyl hydrazine

(d)

semicarbazide

Which of the following compound is optically active?

(a)

CH₃CH₂COOH

(b)

HOOC-CH₂-COOH

(c)

CH₃CH(OH)COOH

(d)

Cl₂CHCOOH

Carboxylic acids are synthesised from Grignard reagent by the action of ________.

(a)

CO₂

(b)

H₂O

(c)

C₆H₅OH

(d)

CH₃OH

On fusion with KOH benzophenone undergoes __________, and gives potassium benzoate and ________.

(a)

disproportionation reaction, toluene

(b)

condensation reaction, toluene

(c)

disproportionation reaction, benzene

(d)

condensation reaction, benzene

What are the various steps involved in the extraction of pure metals from their ores?

Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

Name the ore that can be concentrated by magnetic separation method.

What is the role of graphite rods in the electro metallurgy of aluminium?

Describe briefly allotropism in p- block elements with specific reference to carbon.

What is catenation ? describe briefly the catenation property of carbon.

What are the uses of boron trifluoride?

What is phosgene? How is it prepared?

Give the oxidation state of halogen in the following.
a) OF₂
b) O₂F₂
c) Cl₂O₃
d) I₂O₄

What are interhalogen compounds? Give examples.

(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.

Give reason for the following:
F₂ is more reactive than CIF₃ but CIF₃ is more reactive than Cl₂

What are inner transition elements?

Explain why compounds of Cu²⁺ are coloured but those of Zn²+ are colourless.

Write ionic equation for the reaction between Cr₂O₇^-2 ions and Fe²⁺ ions in acidic medium.

Comparing La(OH)₃ and Lu(OH)₃, which is more basic and explain why?

Write the formula for the co-ordination compounds. 

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

Arrange the following complex ions in the increasing order of crystal filed splitting energy (\({ \triangle }_{ 0 }\)) [CrCI₆]^3-, [Cr(CN)₆]^3-, [Cr(NH₃)₆]³⁺

What are enantiomers?

Distinguish between : Face - centred and body - centred unit cells.

In CaF₂ crystal, Ca²⁺ ions are present in arrangement. Calculate the number of F^- ions in the unit cell.

The rate law for a reaction of A, B and C has been found to be rate = k[A]²[B][L]^3/2 How would the rate of reaction change when
(i) Concentration of [L] is quadrupled
(ii) Concentration of both [A] and [B] are doubled
(iii) Concentration of [A] is halved
(iv) Concentration of [A] is reduced to \(\left(\frac{1}{3}\right)\) and concentration of [L] is quadrupled.

For a reaction A + B ⟶ C, the rate of the reaction is denoted \(\frac { -dA }{ dt } \) or \(\frac { -dB }{ dt } \) or \(\frac { +dC }{ dt } \). State the significance of plus and minus sign.

How does the value of rate constant vary with reactant constant.

Consider the oxidation of nitric oxide to form NO₂
2NO_(g) + O_2(g) ➝2NO_2(g)
(a). Express the rate of the reaction in terms of changes in the concentration of NO,O₂ and NO₂.
(b). At a particular instant, when [O₂] is decreasing at 0.2 mol L⁻¹s⁻¹ at what rate is [NO₂] increasing at that instant?

Discuss the Lowry – Bronsted concept of acids and bases.

Calculate the pH of 0.04 M HNO₃ Solution.

When temperature is increased, will ionic product of water increase or decrease? Give reason to justify your answer.

Write down the conjugate acid and base of the following
(i) NH₃
(ii) HSO^-₄

Describe the electrolysis of molten NaCl using inert electrodes

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.

Account for the following : For a strong electrolyte molar conductivity decreases as concentration increases

Give the expression that relates molar conductivity and degree of dissociation.

What is Ultrafilteration?

Explain the kinetic property of colloids.

Name the only primary alcohol which gives positive iodoform test.

State Saytzeff's rule.

What is DIBAL -H? What is it used for?

What happens when soda lime is treated with
(i) CH₃COONa
(ii) C₆H₅COOH?

Give the basic requirement for vapour phase refining.

Write the chemical composition of the following alloys and give anyone of its application.
(i) Bronze
(ii) Brass
(iii) Stainless steel

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. \({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\ hot }{ \rightarrow } \)

What are the uses of diborane?

How will you prepare chlorine in the laboratory?

Out of H₂O and H₂S which one has higher bond angle and why?

Compare lanthanoids and actinoids.

Explain the oxidising property of KMnO₄ in natural medium. Give the equations.

Give the difference between double salts and coordination compounds.

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.

What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3^rd of tetrahedral voids?

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.

Prove that the time required for the completion \({ \frac { 3 }{ 4 } }^{ th }\) of the reaction of a first order is twice the time required for the completion of a half of the reaction.

Calculate the pH of 1.5\(\times\)10^-3 M solution of Ba(OH)₂

For an aqueous solution of NH₄CI, prove that [H⁺] = \(\sqrt { { K }_{ n }.C } \)

Why is AC current used instead of DC in measuring the electrolytic conductance?

Leclanche cell is a non-rechargeable cell. Answer the questions below with respect to Leclanche cell.
(i) Anode
(ii) Cathode
(iii) Electrolyte
(iv) Oxidation half cell reaction
(v) Reduction half cell reaction.

What do you mean by activity and selectivity of catalyst?

Give three examples of enzyme catalyzed reactions.

How is glycerol obtained commercially? State its uses.

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?

Organic compound with molecular formula C₃H₆O has two isomers (A) and (B). (A) on heating with NaOH in I₂ forms a yellow precipitate while (B) does not. Identify the isomers A and B and explain the reactions.

Explain refining of titanium by Van-Arkel method.

What are the various methods by which carbon-di-oxide is prepared?

How does sulphuric acid react with metals at various conditions.

Write a short note on the oxidation states of 3d series elements.

What are the postulates of valance bond theory? Give its limitations.

What are the general characteristics of solids?

The decomposition of NH₃ on platinum surface is zero reaction. What are the rate of production of N₂ and H₂ it K = 2.5 x 10^-4mol L^-1 S^-1?

If a solution has a pH of 7.41, determine its H⁺ concentration.

The standard reduction potential for the reaction Sn⁴⁺ + 2e^- ⟶ Sn²⁺ is + 0.15v. Calcuate the free energy change of the reaction.

Give the special characteristics of enzyme catalysed reactions.

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.

An organic compound A (C₇H₆O) reduces Tollen's reagent. On treating with an alkali compound A forms B and C. B on treating with sodalime forms benzene and C (C₇H_sO) is an antiseptic. Identify compounds A, B and C. Explain the reactions.