Q. The hardness of soft water (in ppm) is

(A) 0 - 50
(B) 200 - 350
(C) 50 - 150
(D) 375 - 500

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✅ Correct Answer: (A) 0 - 50

Published by Mr. Dubey ⭐ 111.54K Points at 19-Sep-2023 08:09 pm in Environmental Engineering

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