Permanent hardness of water is due to the presence of
(a) bicarbonates of sodium and potassium
(b) chlorides and sulphates of sodium and potassium
(c) chlorides and sulphates of calcium and magnesium
(d) bicarbonates of calcium and magnesium
Answers
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(c) Chlorides and sulphates of calcium and magnesium
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2
Answer:
Explanation:
Permanent hardness of water is due to
chlorides and sulphates of calcium and magnesium
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