Hydrogen gas diffuses $4$ times faster than a mixture of $C_2H_4$ and $CO_2$. Find the molar ratio of $C_2H_4$ and $CO_2$ in the mixture.

At $298 \, K$,equal masses of $SO_2, CH_4$,and $O_2$ are placed in an empty container. The total pressure of the mixture is $2.1 \, atm$. The partial pressure of $CH_4$ in the mixture is ........... $atm$.

The volume of $1$ mole of any pure gas at standard temperature and pressure $(STP)$ is always equal to (in $m^3$)

The ratio of the partial pressure of a gaseous component to the total vapor pressure of the mixture is equal to .......

State Dalton's Law of partial pressure,provide its mathematical formula,and explain aqueous tension.

Normal boiling point of water is $373 \ K$ (at $760 \ mm$). Vapour pressure of water at $298 \ K$ is $23 \ mm$. If the enthalpy of evaporation is $40.656 \ kJ/mole$,the boiling point of water at $23 \ mm$ pressure will be ............. $K$.