Two gases X and Y have their molecular speed in ratio of 3:1 at certain temperature. The ratio of their molecular masses Mx:My is

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Question

Prashant Kotian · Accepted Answer

Correct answer: C. v_X/v_Y = √(M_Y / M_X) => 3/1 = √(M_Y / M_X) => M_Y / M_X = 9/1 => M_X : M_Y = 1:9 .

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