At a given temperature,the rate of diffusion of methane is twice that of gas $X$. The molecular weight of $X$ is ...... .

The units of surface tension and viscosity of liquids respectively are

$A$ 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?

At $T \ K$,hydrogen and oxygen gases are mixed in the ratio of $1:2$ by mass in a closed vessel of volume '$V$' litres. If the total pressure of the gaseous mixture is '$p$' atm,the partial pressure of oxygen (in atm) is

At $500 \, K$ temperature in a $2 \, L$ vessel,$0.32 \, g$ of $O_2$ gas is collected over water. If the vapour pressure of water is $32 \, mbar$ at $500 \, K$,find the partial pressure of dry $O_2$ gas. $(R = 8.314 \times 10^{-2} \, L \, bar \, mol^{-1} \, K^{-1})$

What is the relationship between viscosity and pressure?