Q. Which among the given is responsible for permanent hardness of water -

  • (A) calcium sulphate
  • (B) calcium bicarbonate
  • (C) sodium chloride
  • (D) magnesium bicarbonate
✅ Correct Answer: (A) calcium sulphate

Published by Ram Sharma ⭐ 193.88K Points at 16-Mar-2022 04:46 pm in Science

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