If the diameter of a gas molecule is very small,what will be the mean free path?

If the pressure in a closed vessel is reduced by drawing out some gas,the mean free path of the molecules

Under which of the following conditions is the law $PV = RT$ obeyed most closely by a real gas?

Under what conditions does a real gas obey the relation $PV = RT$?

Internal energy of a non-ideal gas depends on ..........

$A$ system consists of two types of gas molecules $A$ and $B$ having the same number density $2 \times 10^{25} \, /m^3$. The diameters of $A$ and $B$ are $10 \, \mathring{A}$ and $5 \, \mathring{A}$ respectively. They undergo collisions at room temperature. The ratio of the average distance covered by molecule $A$ to that of $B$ between two successive collisions is $..... \times 10^{-2}$.