Select the correct equilibrium reaction in which number of moles remains same on changing the volume.

Options

A. `PCl_(5)(g)iffPCl_(3)(g)+Cl_(2)(g)`
B. `SO_(2)(g)+Cl_(2)(g)iff SO_(2)Cl_(2)(g)`
C. `N_(2)O_(4)(g)iff2NO_(2)(g)`
D. `A_(2)(g)+B_(2)(g)iff2AB(g)`

Answer

D

Explanation

Number of moles at equilibrium remain same for those reaction which have `Deltan_(g)=0` on changing the volume `Deltan_(g)=0` coefficient of gasesous product `-Sigma` coefficient of gaseous reactant
(A) `Deltan_(g)=1+1-1=1`
(B) `Deltan_(g)=1-(1+1)=-1`
(C ) `Deltan_(g)=2-1=1`
(D) `Deltan_(g)=2-(1+1)=0`