In a mole of water vapour at $STP$,the volume actually occupied or taken by the molecules (i.e.,Avogadro's No. $\times$ Volume of one molecule) is

$A$ gas deviates most from ideal behavior when it is subjected to

Under which conditions does the $van \ der \ Waals$ equation reduce to the ideal gas equation?

The compressibility factor $(Z)$ of one mole of a van der Waals' gas of negligible '$a$' value is

$A$ certain quantity of real gas occupies a volume of $0.15 \ dm^3$ at $100 \ atm$ and $500 \ K$ when its compressibility factor is $1.07$. Its volume at $300 \ atm$ and $300 \ K$ (when its compressibility factor is $1.4$) is $........ \times 10^{-4} \ dm^3$ (Nearest integer).

The van der Waals constants for $HCl$ gas are $a = 3.6 \ atm \ L^2 \ mol^{-2}$ and $b = 40 \ mL \ mol^{-1}$. The critical temperature of the gas is : ............. $K$ [ $R = 0.08 \ atm \ L \ K^{-1} \ mol^{-1}$ ]