What is the relationship between the degree of dissociation (α) of PCl₅ and the pressure at equilibrium in the reaction: PCl₅ (g) ⇌ PCl₃ (g) + Cl₂ (g)?

1. $\alpha \propto P$                                         

2.  $\alpha \propto 1/\sqrt{P}$

3.  $\alpha \propto 1/{\mathrm{P}}^2$                                   

4.  $\alpha \propto 1/P^4$

The formation of phosgene is represented as,

            CO + Cl₂ $\rightleftharpoons$COCl₂

The reaction is carried out in 500 mL flask. At equilibrium o.3 mole of phosgene, 0.1 mole of CO and 0.1 mole of Cl₂ are present. The equilibrium constant of the reaction is:

1. 30                     

2. 15

3. 5                       

4. 3

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

1. CH₃COOH                                     

2. NaCl

3. NaOH                                           

4. H₂SO₄

For the reaction, A+B $\rightleftharpoons$3C at 25$°$ C, a 3 litre vessel contains 1, 2, and 4 mole of A, B and C respectively. If K_c for the reaction is 10, then the reaction will proceed in:

1. forward direction                           

2. backward direction

3. in either direction                           

4. in equilibrium

For the reaction, N₂ + 3H₂ $\rightleftharpoons$2NH₃ in a vessel, after the addition of an equal number of mole of N₂ and H₂, the equilibrium state is formed. Which of the following is correct?

1. [H₂] = [N₂]                               

2. [H₂] < [N₂]     

3. [H₂] > [N₂]                                 

4. [H₂] > [NH₃]