Questions in Kinetic Theory of Gases

Select	Question
	The average kinetic energy of a helium atom at ${{30}^{o}}C$ is
	Two gases are at absolute temperatures 300 K and 350 K respectively. Ratio of average kinetic energy of their molecules is
	A gas mixture consists of molecules of type 1, 2 and 3, with molar masses ${{m}_{1}}>{{m}_{2}}>{{m}_{3}}.$ ${{V}_{rms}}$ and $\overline{K}$ are the r.m.s. speed and average kinetic energy of the gases. Which of the following is true
	On colliding in a closed container the gas molecules
	The mean kinetic energy of a gas at 300 K is 100 J. The mean energy of the gas at 450 K is equal to
	The capacity of a vessel is 3 litres. It contains 6 gm oxygen, 8 gm nitrogen and 5 gm $C{{O}_{2}}$ mixture at 27°C. If R = 8.31 J/mole $\times $ kelvin, then the pressure in the vessel in $N/{{m}^{2}}$ will be (approx.)
	Vapour is injected at a uniform rate in a closed vessel which was initially evacuated. The pressure in the vessel
	In the absence of intermolecular force of attraction, the observed pressure P will be
	The total momentum of the molecules of 1 gm mol of a gas in a container at rest of 300 K is
	Two ideal gases at absolute temperature T1 and T2 are mixed. There is no loss of energy. The masses of the molecules are m1 and m2 and the number of molecules in the gases are n1 and n2 respectively. The temperature of mixture will be