The ratio $\gamma$ for inert gases is

When $CH_4$ gas is collected over water,the total pressure is $735 \ torr$ and the temperature is $292 \ ^\circ C$. If the vapor pressure of water at $292 \ ^\circ C$ is $30 \ torr$,then the pressure exerted by the dry methane gas will be .......... $torr$.

If $X \, mL$ of $H_2$ gas diffuses through a hole in a container in $5 \, s$,what is the time taken for the diffusion of the same volume of another gas under identical conditions?

Which one of the following statements is wrong for gases?

If $4 \ g$ of oxygen diffuse through a very narrow hole,how much hydrogen would have diffused under identical conditions? (in $g$)

What is meant by payload?