Question

Two gaseous molecules `A` and `B` are traveling towards each other. Let the mean free path of the molecule be `sigma` and `Z` be the collision number with other molecules at pressure `1 atm`. Answer the following questions
If the mean free path is `sigma` at `1 atm` pressure, then its value at `5 atm` pressure is
A. `5sigma`
B. `(2)/(5)sigma`
C. `(sigma)/(5)`
D. None

Answer 1

`sigma prop (1)/(P)`.
Therefore, `sigma` at `5 atm` is `(sigma)/(5)`.