Sodium magnesium and aluminum can be obtained from their ore by________.

(a)

electro metallurgy

(b)

pyro metallurgy

(c)

hydro metallurgy

(d)

smelting

Oxidation state of carbon in its hydrides _______.

(a)

+4

(b)

-4

(c)

+3

(d)

+2

S-S bond is present in _______.

(a)

H₂S₂O₇

(b)

H₂SO₅

(c)

H₂S₂O₆

(d)

H₂S₂O₆

The alloy of copper that contain Zinc is________.

(a)

Monel metal

(b)

Bronze

(c)

bell metal

(d)

brass

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 _______.

(a)

0.02

(b)

0.002

(c)

0.01

(d)

0.2

A binary solid A+B has a structure with B^- ions constituting the lattice and A⁺ ions occupying 25% tetrahedral holes. Formula of the solid is _______.

(a)

A₂B

(b)

AB₂

(c)

AB

(d)

AB₄

For a reaction Rate = k[acetone]^3/2 then unit of rate constant and rate of reaction respectively is _______.

(a)

(mol L^-1 S^-1),(mol^1/2 L^1/2 S^-1)

(b)

(mol^-1/2 L^1/2 s^-1),(mol L^-1 s^-1)

(c)

(mol^1/2 L^1/2 s^-1),(mol L^-1 s^-1)

(d)

(mol L s^-1),(mol^1/2 L^1/2 s)

Which of the following fluro compounds is most likely to behave as a Lewis base?

(a)

BF₃

(b)

PF₃

(c)

CF₄

(d)

SiF₄

With regard to the strength of acids and bases, Find the incorrect statement among the following.

(a)

Strong acid is one that completely dissociates in water

(b)

K_a is the dissociation constant

(c)

CH₃COOH is a weak acid

(d)

Smaller the K_a value, greater is the acid strength

The feasibility of a redox reaction can be predicted with the help of ______.

(a)

Electronegativity

(b)

Electrochemical series

(c)

Electron affinity

(d)

Equivalent conductance

The phenomenon observed when a beam of light is passed through a colloidal solution is_______.

(a)

Cataphoresis

(b)

Electrophoresis

(c)

Coagulation

(d)

Tyndall effect

Glycol \(\overset { 773K }{ \longrightarrow } \) 'A'. Identify 'A' _______.

(a)

(b)

\(\overset { { CH }_{ 3 } }{ \underset { CHO }{ | } } \)

(c)

(d)

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

Oxidation of aniline with acidified potassium dichromate give

(a)

p-benzo quinone

(b)

benzoic acid

(c)

benzaldehyde

(d)

benzyl alcohol

The sugar unit present in nucleic acid is___________

(a)

a hexose

(b)

tetrose

(c)

pentose

(d)

glucose

Name the two steps involved in the extraction of crude metal

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

Give the reason for bleaching action of Cl₂.

Draw the Cis and trans isomer of MA₂B₂ type

Distinguish tetrahedral and octahedral voids.

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?

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.

Give the uses of mercury button cell.

Suggest a suitable reagent to prepare secondary alcohol with identical group using Grignard reagent.

What is liquation?

Account for the following:
(i) Cobalt (II) is stable in aqueous solution but in the presence of complexing reagents, it is easily oxidised.
(ii) The d¹ configuration is very unstable in ions.

Explain the process of recharging of lead storage battery.

What is the difference between a sol and a gel?

How is nitroglycerine prepared from glycerol?

How will you convert benzaldehyde into the following compounds?
(i) benzophenone
(ii) benzoic acid
(iii) α-hydroxyphenylaceticacid.

Convert aniline to p-nitro aniline

Justify the presence of keto group in C₂ in fructose.

Give the structure of melamine formaldehyde resin.

1. How will you convert boric acid to boron nitride?

2. Account for the following:
   (i) Reducing character decreases from SO₂ to TeO₂.
   (ii) Xenon forms compounds with fluorine and oxygen only.

1. Complete the following reactions
   (i) Cr₂O₇^2- ⟶
   (ii) Cr₂O₇^2- + 6I^-+ 14H⁺ ⟶
   (iii)  Cr₂O₇^2-+ 3S^2-+ 14H⁺ ⟶
   (iv) Cr₂O₇^2- + 3SO₂ + 2H⁺ ⟶
   (v) Cr₂O₇^2- + 3Sn²⁺ + 14H⁺ ⟶
   (vi) K₂Cr₂O₇ + 8H₂SO₄ + 3CH₃CH₂OH ⟶
   (vii) 2MnO₄^- + 5(COO)^2- + 6H⁺ ⟶
   (viii) 2MnO₄^- + 10I^- + 16H⁺ ⟶
   (ix) 2MnO₄^- + 5S^2-+ 16H⁺ ⟶
   (x) 2MnO₄^- + 5NO₂^- + 6H⁺ ⟶
   (xi) 2KMnO₄ + 3H₂SO₄ + 5CH₃CH₂OH ⟶
   (xii) 2MnO₄^- + 5SO₃^2- + 6H⁺ ⟶

2. What are the general characteristics of solids?

1. 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

2. Benzene diazonium chloride in aqueous solution decomposes according to the equation \({ C }_{ 6 }{ H }_{ 5 }{ N }_{ 2 }Cl\longrightarrow { C }_{ 6 }{ H }_{ 5 }Cl+{ N }_{ 2 }\)Starting with an initial concentration of 10g L^-1, the volume of N₂ gas obtained at 50 °C at different intervals of time was found to be as under:

   t(min)	6	12	18	24	30	\(\infty \)
   Vol of N2 (ml)	19.3	32.6	41.3	46.5	50.4	58.3

   Show that the above reaction follows the first order kinetics. What is the value of the rate constant?

1. K_sp of 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?

2. Explain the following
   (i) Reactant selectivity
   (ii) Transition state selectivity
   (iii) Product selectivity 

1. Complete the following reactions
   
   ii) \(C_6H_5-CH_{2}CH(OH)CH(CH_3)_2 \overset{ConH_2SO_4}\longrightarrow\)

2. Compound A of molecular formula C₃H₆O does not reduce Tollens reagent and Fehling's solution. Compound A undergoes Clemmensen reduction to give compound B of molecular formula C₃H₈. Compound A in the presence of cone.H₂SO₄ condenses to give an aromatic compound C of molecular formula C₉H₁₂. Identify A, B and C. Explain the reactions.