The permanent hardness of water appears due to:

Question 

The permanent hardness of water appears due to:

(a) Carbonates of calcium and magnesium

(b) Bicarbonates of calcium and magnesium

(c) Chloride and sulphate of calcium and magnesium

(d) None of these

Solution

Correct Answer is: (c) Chloride and sulphate of calcium and magnesium

 

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