Which of the following facts regarding mean free path of gaseous molecules is/are correct?

Options

A. A. Mean free path is directly proportional to Kelvin temperature provided pressure of the gas is held constant
B. B. Mean free path is directly proportional to pressure provided temperature of the gas is held constant.
C. C. Mean free path is inversely proportional to the molecular diameter `(sigma^(2))`
D. D. Mean free path is inversely proportional to the number of molecules per unit volume of the gas.

Answer

A, C, D

Explanation

The expression of mean free path is `lambda = 1// sqrt2 pi sigma^(2) N^(**)` where `N^(**) = pi //KT` .
Hence , `lambda = kT//sqrt2 pi sigma^(2) p`