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

In which of the following reactions, the equilibrium remains unaffecte

1.	In which of the following reactions, the equilibrium remains unaffected on addtion of small amount of argon at constant volume ?
Answer» `H_(2) (g) + I_(2) (g) hArr 2 HI (g)` `PCl_(5)(g) hArr PCl_(3) (g) + Cl_(2) (g)` `N_(2) (g) + 3 H_(2)(g) hArr 2 NH_(3) (g)` The equilibrium will REMAIN unaffected in all the three cases. Solution :On adding inert GAS at CONSTANT volume to any equilibrium, it remains unaffected.