In which of the following system, doubling the volume of the container causes a shift to the right

Options

A. `2CO(g)+O_(2)(g)hArr 2CO_(2)(g)`
B. `N_(2)(g)+3H_(2)(g)hArr 2NH_(3)(g)`
C. `PCl_(5)(g)hArr PCl_(3)(g)+Cl_(2)(g)`
D. `H_(2)(g) +Cl_(2)(g)hArr 2HCl(g)`

Answer

C

Explanation

On doubling the volume , pressure decreases and the reaction shifts in the direction of increasing number of moles.