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JEE Main Chemistry question

ChemistryHydrogenJEE Main

Not in JEE Main or NEET syllabus

Which is the lightest gas?

Answer: (B)

Solution

Molar masses: H ≈ 2 g/mol, He ≈ 4 g/mol, N ≈ 28 g/mol, O ≈ 32

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Question ID VK-137245