Q. Brass gets discoloured in air because of the presence of which of the following gases in air?

  • (A) Oxygen
  • (B) Hydrogen sulphide
  • (C) Carbon dioxide
  • (D) Nitrogen
✅ Correct Answer: (B) Hydrogen sulphide

Published by Ranjeet ⭐ 34.60K Points at 30-Jul-2020 01:14 pm in Science

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