Q. At a given temperature the $r.m.s.$ velocity of molecules of the gas is
A) Same
B) Proportional to molecular weight
C) Inversely proportional to molecular weight
D) Inversely proportional to square root of molecular weight
Explanation
(d) $v_{rms} = \sqrt{\frac{3RT}{M}} \Rightarrow v_{rms} \propto \frac{1}{\sqrt{M}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.