For a gas,the ratio $C_p/C_v$ is $1.3$ and its atomic mass is $M$. What is the molecular mass of the gas?

$0.5 \text{ mole}$ of each of $H_{2}$,$SO_{2}$,and $CH_{4}$ are kept in a container. $A$ hole was made in the container. After $3 \text{ h}$,the order of partial pressures in the container will be

Kinetic energy of molecules is highest in

Which of the following gases has the largest mean free path?

The mass of molecule $A$ is half the mass of molecule $B$. The $rms$ speed of $A$ is twice the $rms$ speed of $B$. If two samples of $A$ and $B$ contain the same number of molecules and are taken in two separate containers of equal volume,what will be the ratio of the pressure of $A$ to the pressure of $B$ $(P_A/P_B)$?

At $T$ $K$,the ratio of kinetic energies of $4$ $g$ of $H_{2(g)}$ and $8$ $g$ of $O_{2(g)}$ is