The blistered appearance of Cu obtained from the reverberatory furnace is due to evolution of________.

(a)

CO₂ gas

(b)

SO₂ gas

(c)

NO₂

(d)

Due to evaporation of volatile materials

The stability of +1 oxidation state increases in the sequence ________.

(a)

Al < Ga < In < Tl

(b)

Tl < In < Ga < Al

(c)

In < Tl < Ga < Al

(d)

Ga< In < Al < Tl

Orthophosphorus acid on heating gives______.

(a)

Hypophosphorous

(b)

Orthophosphoric acid

(c)

Phosphine gas

(d)

both (b) and (c)

The magnetic moment of Mn²⁺ ion is _______.

(a)

5.92BM

(b)

2.80BM

(c)

8.95BM

(d)

3.90BM

A complex in which the oxidation number of the metal is zero is_______.

(a)

K₄[Fe(CN)₆]

(b)

[Fe(CN)₃(NH₃)₃]

(c)

[Fe(CO)₅]

(d)

both (b) and (c)

For a solid with the following structure. The co-ordination number of the point B is_______.

(a)

3

(b)

4

(c)

5

(d)

6

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

pH of a saturated solution of Ca(OH)₂ is 9. The Solubility product (K_sp) of Ca(OH)₂ _______.

(a)

0.5 × 10^-15

(b)

0.25 × 10^-10

(c)

0.125 × 10^-15

(d)

0.5 × 10^-10

Degree of dissociation a is _______.

(a)

\(\alpha =\frac { { K }_{ a } }{ C } \)

(b)

\(\alpha =\frac { { C }^{ 2 } }{ { K }_{ a } } \)

(c)

\(\alpha =\sqrt { \frac { { K }_{ a } }{ C } } \)

(d)

\(\alpha =\sqrt { \frac { C }{ { K }_{ a } } } \)

Degree of dissociation of pure water is 2.8 x 10^-9. Molar ionic conductance of H⁺ and OH^- ions at infinite dilution are 300 and 350 S cm² respectively. The molar conductance of water is ________.

(a)

1.5 x 10^-6 S mol^-1

(b)

2.8 x 10^-7 S cm² mol^-1

(c)

1.82 x 10^-6 S cm² mol^-1

(d)

3.8 x 10^-6 S cm^-1 mol^-1

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

(a)

Cataphoresis

(b)

Electrophoresis

(c)

Coagulation

(d)

Tyndall effect

The number of primary alcoholic groups in ethylene glycol is ________.

(a)

0

(b)

1

(c)

2

(d)

3

_______.

(a)

(b)

(c)

(d)

C₆H₅CHO + Methylamine ⟶ X Y + H₂SO₄-p amino benzene sulphonic acid. Then X and Y are

(a)

Schiff's Base, C₆H₅NH₂

(b)

C₆H₆, C₆H₅CHO

(c)

benzal- N - methyl amine, Toluene

(d)

None of these

Glucose forms________with acetic anhydride and sodium acetate.

(a)

di acetate

(b)

tetra acetate

(c)

penta acetate

(d)

hexa acetate

What is distillation?

Give the structure of CO and CO₂.

Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?

What is Co-ordination sphere?

Give any three characteristics of ionic crystals.

For a chemical reaction, Variation in the concentration In[A] Vs time in seconds is given as

(i) What is the order of the reaction?
(ii) What is the unit of rate constant K?
(iii) Give the relationship between k and \({ t }_{ \frac { 1 }{ 2 } }\)

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^-

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

Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.

What is cyanide leaching? Give an example

What is chromyl chloride test? Give equations.

What is the oxidation and reduction half cell in a Daniel cell?

Why are lyophillic colloidal sols are more stable than lyophobic colloidal sol.

How is glycerol obtained commercially? State its uses.

What is the action of HCN on
(i) propanone
(ii) 2,4-dichlorobenzaldehyde
iii) ethanal

Starting from the following reagents, how will your prepare ethanenitrile.
i) CH₃Br
ii) CH₃CONH₂
iii) CH₃CH=NOH

Justify the presence of keto group in C₂ in fructose.

Write the preparation of neoprene and give its use.

1. 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.

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.

1. K_sp of AgCl is \(1.8\times10^{-10}\). Calculate molar solubility in 1 M AgNO₃

2. Write the characteristics of catalysts.

1. What are stoichiometric defects in ionic solids? Explain

2. 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?

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. How are Co-ordination compounds classified?

1. Write a note on zeolites.

2. How is sulphuric acid manufacture by contact process?