Q. Mean free path of a gas molecule is
A) Inversely proportional to number of molecules per unit volume
B) Inversely proportional to diameter of the molecule
C) Directly proportional to the square root of the absolute temperature
D) Directly proportional to the molecular mass
Explanation
(a) Mean free path, $\lambda = \frac{1}{\sqrt{2}\pi d^{2}n}$
Where, $n =$ Number of molecules per unit volume
$d =$ Diameter of the molecules
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.