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JEE Main Chemistry question

ChemistryStates of Matter (Gaseous & Liquid State)JEE Main

of gas effuses through a pin hole in seconds. The same volume of gas under identical conditions effuses in seconds. If the molecular mass of gas is , the molecular mass of gas will be:

Answer: (B)

Solution

By Graham's law of effusion, for equal volumes effusing under identical conditions, rate volume/time, so . Substituting , and :

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Question ID VK-134459