Q. The rates of diffusion of $SO_{2},\ CO_{2},\ PCl_{3}$ and $SO_{3}$ are in the following order
A) $PCl_{3} > SO_{3} > SO_{2} > CO_{2}$
B) $CO_{2} > SO_{2} > PCl_{3} > SO_{3}$
C) $SO_{2} > SO_{3} > PCl_{3} > CO_{2}$
D) $CO_{2} > SO_{2} > SO_{3} > PCl_{3}$
Explanation
(d)
Rate of diffusion is inversely proportional to the molecular weight
$r \propto \sqrt{\frac{1}{M}}$
So, the order of rate of diffusion is
$CO_{2} > SO_{2} > SO_{3} > PCl_{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.