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Hardness of Water and Treatment

Permanent har...

Question

Permanent hardness of water is due the presence of:

A

calcium carbonate

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B

calcium chloride

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C

calcium bicarbonate

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D

calcium sulphide

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Solution

The correct option is C calcium chloride
Permanent hardness is due to the presence of sulphate or chloride salts of $C a$ or $M g$ .

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