At higher altitudes,the boiling point of water lowers because:

The density of a gas at $STP$ is $2.86 \, g \, L^{-1}$. Which gas is it?

Two grams of hydrogen diffuse from a container in $10 \ min$. How many grams of oxygen would diffuse through the same container in the same time under similar conditions?

If $X \, mL$ of $H_2$ gas diffuses through a hole in a container in $5 \, s$,what is the time taken for the diffusion of the same volume of another gas under identical conditions?

$CO_2$ and $N_2$ do not support combustion. However,$CO_2$ is preferred over $N_2$ for extinguishing fires because $CO_2$ .......

The ratio of the rate of diffusion of helium and methane under identical conditions of pressure and temperature will be