Q. Permanent hardness of water is due to the presence of ?

  • (A) Sodium bicarbonate
  • (B) Calcium sulphate
  • (C) Magnesium bicarbonate
  • (D) Calcium bicarbonate
✅ Correct Answer: (B) Calcium sulphate

Published by Rakesh Yadav ⭐ 5.76K Points at 21-Nov-2021 05:53 am in Chemistry

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