The rate of diffusion of two gases $x$ and $y$ is $10 \, mL/s$ and $40 \, mL/s$ respectively,then the ratio of their molar masses $(Mw_x : Mw_y)$ is

Which gas volume is measured in a sample by using a solution of $CuCl$ in $NH_4OH$ through the measurement of volume change?

According to Graham's law at a given temperature,the ratio of the rates of diffusion ${r_A}/{r_B}$ of gases $A$ and $B$ is given by

Assertion: Standard boiling point of a liquid is slightly higher than the normal boiling point. Reason: $1 \ bar$ pressure is slightly less than $1 \ atm$ pressure.

How will the viscosity of a liquid be affected by an increase in temperature?

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