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Question

Water is said to be permanently hard when it contains

A
sulphates and chlorides of Mg and Ca
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B
bicarbonates of Mg and Ca
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C
sulphates Cu and Hg
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D
carbonates and bicarbonates of Mg and Ca
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Solution

The correct option is B sulphates and chlorides of Mg and Ca
Water is said to be permanently hard when it contains sulphates and chlorides of Mg and Ca.

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