Q. What is laughing gas?

  • (A) Nitrous Oxide
  • (B) Carbon monoxide
  • (C) Sulphur dioxide
  • (D) Hydrogen peroxide
✅ Correct Answer: (A) Nitrous Oxide

Published by Madan ⭐ 7.44K Points at 13-May-2021 05:31 am in Science

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