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  4. Two tanks of equal volumes contain equal masses of hydrogen and helium at the same temperature. Then :

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Q. Two tanks of equal volumes contain equal masses of hydrogen and helium at the same temperature. Then :

Kinetic Theory

Solution:

By gas law $P V=\frac{m}{M} R T$ we can directly find that option (B) is correct. Total translational kinetic energy of a gas depends upon the temperature of the gas and total number of molecules as $E=(3 / 2) N k T$ hence option (C) is correct. Total kinetic energy of a gas is given as $E_{T}=(f / 2) k T$ hence option (D) is also correct.