MCQ
Some inert gas is added at constant volume to the following reaction at equilibrium

$N{H_4}HS(s) \rightleftharpoons N{H_3}(g) + H_2S(g)$

Predict the effect of adding the inert gas

  • A
    The equilibrium shifts in the forward direction
  • B
    The equilibrium shifts in the backward direction
  • The equilibrium remains unaffected
  • D
    The value of $K_p$ is increased

Answer

Correct option: C.
The equilibrium remains unaffected
c
When an inert gas is added to the system in equilibrium at constant volume, the total pressure will increase.

- But the concentrations of the products and reactants (i.e. ratio of their moles to the volume of the container) will not change.

- Hence, when an inert gas is added to the system in equilibrium at constant volume there will be no effect on the equilibrium.

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