question_answer 120)

  In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume? (a) \[{{H}_{2}}(g)+{{I}_{2}}(g)\underset{{}}{\leftrightarrows}HI(g)\]         (b) \[PC{{l}_{5}}(g)\underset{{}}{\leftrightarrows}PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] (c) \[{{N}_{2}}(g)3{{H}_{2}}(g)\underset{{}}{\leftrightarrows}2N{{H}_{3}}(g)\]                                    (d) The equilibrium will remain unaffected in all the three cases.

Answer:

  (d) At constant volume, there is no effect of inert gas addition.