Q. A hard water may contain

(A) Calcium carbonate
(B) Magnesium sulphate
(C) Magnesium bicarbonate
(D) Any of the above

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✅ Correct Answer: (D) Any of the above

Published by Mr. Dubey ⭐ 104.84K Points at 19-Sep-2023 08:08 pm in Environmental Engineering

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