Two gases $A$ and $B$ having the same volume diffuse through a porous partition in $20$ and $10$ seconds respectively. The molecular mass of $A$ is $49 \ u$. The molecular mass of $B$ will be .............. $u$.

Which of the following mixtures of gases does not obey Dalton's law of partial pressure?

$A$ container contains equal masses of $H_2$,$He$,$CO_2$ and $Ne$ at a certain temperature. Which of the following gas exerts maximum partial pressure?

What is the coefficient of viscosity? Give its unit.

For any pure liquid at a pressure of $1.013 \ bar$,the temperature at which the liquid and vapor are at equilibrium is called:

It takes $38 \, s$ for $1 \, mol$ of $N_2$ gas to effuse through a pinhole at a pressure of $0.8 \, atm$. It takes $57 \, s$ for $1 \, mol$ of an unknown gas $X$ to effuse through the same pinhole at a pressure of $1.6 \, atm$. Calculate the molar mass of $X$.