Q. Which of the following gases is lighter than air?

  • (A) Carbon dioxide
  • (B) Nitrogen
  • (C) Helium
  • (D) Argon
✅ Correct Answer: (C) Helium
Explanation: Helium is lighter than air, which is why it is used to fill balloons.

Published by Sikhar Chaudhary ⭐ 6.79K Points at 06-Oct-2025 06:46 am in Chemistry

Explanation by: Sikhar Chaudhary
Helium is lighter than air, which is why it is used to fill balloons.

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