The gas phase reaction `PCl_(5)(g)<=> PCl_(3)(g)+Cl_(2)(g)` is an endothermic reaction. The formation of `PCl_(5)` in equilibrium mixture of `PCl_(5)(g), PCl_(3)(g) and Cl_(2)(g)` can be decreased by :

Options

A. Decreasing the temperature
B. Addition of an inert gas at constant pressure
C. Decreasing the volume
D. Addition of an inert gas at constant volume

Answer

B

Explanation

`to` By decreasing the temperature, reaction will proceed in backward direction as per Le-Chatelier’s principle.
`to` By adding inert gas at constant pressure, volume will increase, so Crowding will decrease so the reaction will proceed in that direction in which the crowding is more i.e. forward direction.
`to` When the volume is decreased, crowding increases due to which reaction proceeds backward as per Le – Chatelier’s principle.
`to` no effect.