Temporary hardness in water is also known as:

ASulphate hardness

BNitrate hardness

CChloride hardness

DCarbonate hardness ✓ Correct

Correct answer: (D) Carbonate hardness

Explanation

Temporary hardness is also known as carbonate hardness.

It arises from dissolved bicarbonates of calcium and magnesium and is removed by boiling.

Sulphate hardness is a form of permanent hardness, not temporary.

Nitrate hardness is not the accepted term for temporary hardness.

Chloride hardness is part of permanent hardness, not temporary.

Permanent hardness, from sulphates and chlorides, needs chemical softening.

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