Q. In which one of the following gaseous equilibria, $K_{p}$ is less than $K_{c}$?
A) $N_{2}O_{4} \rightleftharpoons 2NO_{2}$
B) $2SO_{2} + O_{2} \rightleftharpoons 2{SO}_{3}$
C) $2HI \rightleftharpoons H_{2} + I_{2}$
D) $N_{2} + O_{2} \rightleftharpoons 2NO$
Explanation
(b)
$K_{p} = K_{c}(RT)^{\mathrm{\Delta}ng}$
$\mathrm{\Delta}ng = - 1$ (For the reaction, $2SO_{2} + O_{2} \rightleftharpoons 2{SO}_{3}$). Thus, for this reaction, $K_{p}$ is less than $K_{c}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.