At very low pressure,the compressibility factor $Z$ of a $CO_2$ gas with constant molar volume is:

Which of the following gases of the same mass exerts the highest pressure at a constant temperature?

Select the correct statement for the equation $PV = nRT$.

In which of the following conditions will the molar volume of $CO_2$ be maximum?

At $298 \, K$ temperature,$4 \, g$ of $H_2$ gas is filled in a $500 \, mL$ vessel. Due to a small hole in the vessel,after some time,the pressure in the vessel becomes $50 \, bar$. Find the number of $H_2$ molecules that have escaped from the vessel? $(R = 8.314 \times 10^{-2} \, L \, bar \, mol^{-1} \, K^{-1})$

At constant temperature,a gas is at a pressure of $940.3 \, mm \, Hg$. The pressure at which its volume decreases by $40 \%$ is $......... \, mm \, Hg$. (Nearest Integer)