In which of the following reactions `K_(p) " and " K_(c)` are equal ?

Options

A. `2SO_(2)(g) +O_(2) (g) hArr 2SO_(2)(g)`
B. `PCI_(5)(g) hArr PCI_(3)(g) +CI_(2) (g)`
C. `2HI(g) hArr H_(2) (g) +I_(2)(g)`
D. `N_(2)(g) +3H_(2)(g) hArr 2NH_(3)(g)`

Answer

C

Explanation

`K_(p) " and "K_(c)` become equal if `Deltan=0.i.e.,` gaseous products and reactants have equal number of moles.