If two gases of molecular weights M1 and M2 are at same pressure and temperature, ratio of their r.m.s. speed will be

For Competitive Exams

If two gases of molecular weights M₁ and M₂ are at same pressure and temperature, ratio of their r.m.s. speed will be

M₂: M₁

M₁: M₂

$\sqrt{M_1} : \sqrt{M_2}$

$\sqrt{M_2} : \sqrt{M_1}$

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Which one of the following quantities can be zero on a average for the molecules of an ideal gas in equilibrium?

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