In the dissociation of 2HI $\rightleftharpoons$H₂ + I₂, the degree of dissociation will be influenced by the:

1. Addition of inert gas at constant volume

2. Addition of inert gas at constant pressure

3. Increase of temperature

4. Increase of pressure

Equimolar solutions of the following substances were prepared separetly. Which one of these will record the highest pH value?                                                                                             

1. BaCl₂         

2. AlCl₃         

 3. LiCl           

4. BeCl₂

The correct order of increasing [H₃O⁺] in the following aqueous solutions is:

1. 0.01 M H₂S < 0.01 M H₂SO₄<0.01 M NaCl<0.01M NaNO₂

2. 0.01 M NaCl< 0.01 M NaNO₂<0.01 M H₂S< 0.01 M H₂SO₄

3. 0.01 M NaNO₂<0.01 M NaCl<0.01 M H₂S<0.01 M H₂SO₄

4. 0.01 M H₂S<0.01 M NaNO₂<0.01 M NaCl<0.01 M H₂SO₄

If the pressure of N₂ and H₂ mixture in a closed apparatus is 100 atm and 20% of the mixture then reacts, the pressure at  the same temperature would be:

1. 100                   

2. 90

3. 85                     

4. 80

The following reactions are known to occur in the body,

    CO₂ + H₂O$\rightleftharpoons$H₂CO₃$\rightleftharpoons$H⁺ + HCO₃^-                 

If CO₂ escapes from the system, then:

1. pH will decrease

2. hydrogen ion concentration will diminish

3. H₂CO₃ concentration will be unaltered

4. the forward reaction will be promoted

Which salt undergoes hydrolysis?

1. CH₃COONa                                     

2. KNO₃

3. NaCl                                               

4. K₂SO₄

If K₁ and K₂ are equilibrium constants for reactions (I) and (II) respectively for,

N₂ + O₂ $\rightleftharpoons$2NO           .....(i)

$\frac{1}{2}$N₂ + $\frac{1}{2}$O₂ $\rightleftharpoons$ NO     .....(ii)

Then:

1. K₂ =K₁                    

2. K₂ =$\sqrt{K_1}$

3. K₁ =2K₂                    

4. K₁ = $\frac{1}{2}$K₂

According to Le-Chatelier's principle, adding heat to a solid $\rightleftharpoons$liquid equilibrium will cause the :

1. Temperature to increase

2. Temperature to decrease

3. Amount of liquid to decrease

4. Amount of solid to decrease

Ostwald's solution dilution law is applicable in the case of the solution of:

1. CH₃COOH                                     

2. NaCl

3. NaOH                                           

4. H₂SO₄

At 25$°$C, the dissociation constant of a base, BOH is 1.0 x 10^-12. The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be                                     

1. 2.0 x 10^-6 mol L^-1             

2. 1.0 x 10^-5 mol L^-1 

3. 1.0 x10^-6 mol  L^-1             

4. 1.0 x10^-7 mol L^-1