A perfect gas at $27^\circ C$ is heated at constant pressure to $327^\circ C$. If original volume of gas at $27^\circ C$ is $V$ then volume at $327^\circ C$ is
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Five moles of helium are mixed with two moles of hydrogen to form a mixture. Take molar mass of helium $M_1=4\ g$ and that of hydrogen $M_2=2\ g$ The equivalent molar mass of the mixture is
One mole of monoatomic gas and three moles of diatomic gas are put together in a container. The molar specific heat (in $J\,{K^{ - 1}}\,mo{l^{ - 1}})$ at constant volume is $(R = 8.3\,J\,{K^{ - 1}}\,mo{l^{ - 1}})$
If the collision frequency of hydrogen molecules in a closed chamber at $27^{\circ} \mathrm{C}$ is $\mathrm{Z}$, then the collision frequency of the same system at $127^{\circ} \mathrm{C}$ is :
A cubical box with porous walls containing an equal number of ${O_2}$ and $H_2$ molecules is placed in a large evacuated chamber. The entire system is maintained at constant temperature $T.$ The ratio of ${v_{rms}}$ of ${O_2}$ molecules to that of the ${v_{rms}}$ of $H_2$ molecules, found in the chamber outside the box after a short interval is