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Byju's Answer
Standard XII
Chemistry
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 Ca or Mg.

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