The ratio of $\frac{C_p}{C_v}$ for inert gases is

$A$ gaseous mixture of $2$ moles of $A$,$3$ moles of $B$,$5$ moles of $C$,and $10$ moles of $D$ is contained in a vessel. Assuming that gases are ideal and the partial pressure of $C$ is $1.5 \ atm$,what is the total pressure (in $atm$)?

When $0.0168 \ mol$ of $O_2$ obtained from the decomposition of $KClO_3$ is collected over water at $25 \ ^oC$,the volume is $428 \ mL$ and the total pressure is $754 \ mm$. What is the aqueous tension (water vapor pressure) at $25 \ ^oC$ in $mm$?

The density of phosgene $(COCl_2)$ gas at $STP$ is........

$A$ sample of $N_2$ gas at $0.8 \, atm$ pressure takes $38 \, s$ to effuse through a pinhole. $A$ sample of $1 \, mol$ of an unknown gas '$X$' at $1.6 \, atm$ pressure takes $57 \, s$ to effuse through the same pinhole. The molar mass of gas '$X$' in $g/mol$ is .............

Diffusion of $CH_{4(g)}$ and $O_{2(g)}$ occurs under similar conditions,then the ratio of their rates of diffusion is