In which of the following reactions, the equilibrium remains unaffected on the addition of a small amount of argon at constant volume?

(i) H_{2}(g)+I_{2}(g)\leftrightharpoons 2HI(g)

(ii) PCl_{5}(g)\leftrightharpoons PCl_{3}(g)+ Cl_{2}(g)

(iii) N_{2}(g)+3H_{2}(g)\leftrightharpoons 2NH_{3}(g)

(iv) The equilibrium will remain unaffected in all three cases.

Answers (1)

The answer is the option (iv) The equilibrium will remain unaffected in all three cases.

Explanation: At constant volume, equilibrium remains unaffected even on the addition of inert gas.

In each of the other cases,

(i) H_{2}(g)+I_{2}(g)\leftrightharpoons 2HI(g)

(ii) PCl_{5}(g)\leftrightharpoons PCl_{3}(g)+ Cl_{2}(g)

(iii) N_{2}(g)+3H_{2}(g)\leftrightharpoons 2NH_{3}(g) the Equilibrium will remain unaffected on addition of Argon which is an inert gas.

Thus, the correct answer has to be the option (iv).


 

 

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