Q. If $X$ is the total number of collisions which a gas molecule register with others per unit time under particular conditions, then the collision frequency of the gas containing $N$ molecules per unit volume is
A) $X/N$
B) $NX$
C) $2\ NX$
D) $NX/2$
Explanation
(d)
Number of collisions of one molecules/unit time=$X$
Number of collision of $N$ molecules/unit time=$NX$.
As in one collision, two molecules are involved, collision frequency=$NX/2$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.