Question

Introduction of inert gas in a gaseous reaction $(\Delta n_g\ne O)$ at equilibrium keeping pressure constant has no effect on equilibrium state.

• A. True
• B. False

Answer 1

The correct option is B False

Introduction of inert gas in a gaseous reaction $(\Delta n_g\ne O)$ at equilibrium keeping pressure constant affects equilibrium state.
When an inert gas is added at constant pressure, the volume will increase. The number of moles per unit volume of various reactants and products will decrease. Hence, the equilibrium will shift in a direction in which there is increase in number of moles of gases.
For example, for the reaction $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$, the addition of inert gas at constant pressure will shift the equilibrium to the backward direction.