Q. Which of the following is the lightest gas?

  • (A) Oxygen
  • (B) Hydrogen
  • (C) Nitrogen
  • (D) Helium
✅ Correct Answer: (B) Hydrogen
Explanation: Hydrogen is the lightest gas, with a molecular weight of about 2 g/mol.

Published by Sikhar Chaudhary ⭐ 6.79K Points at 06-Oct-2025 06:43 am in Chemistry

Explanation by: Sikhar Chaudhary
Hydrogen is the lightest gas, with a molecular weight of about 2 g/mol.

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