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Question
Name the substances which make water (i) temporary hard (ii) permanent hard.
Name the substances which make water (i) temporary hard (ii) permanent hard.
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Solution
The presence of hydrogen carbonates of calcium and magnesium makes water temporarily hard.
The presence of sulphates and chlorides of magnesium and calcium makes water permanently hard.
The presence of sulphates and chlorides of magnesium and calcium makes water permanently hard.
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