In which of the following reactions, increase in the pressure at temperature does not affect the moles at equilibrium:

Options

A. `2NH_(3(g))hArrN_(2(g)) + 3H_(2(g))`
B. `C_((g)) + 1//2 O_(2(g))hArrCO_((g))`
C. `H_(2(g)) + 1//2 O_(2(g))hArrH_(2)O_((g))`
D. `H_(2(g)) + I_(2(g))hArr2HI_((g))`

Answer

D

Explanation

`Delta n =0` and thus no changbe on equilibrium concentrations.