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Question

Which of the following is not true?

A
Permanent hardness can be removed by boiling the water
B
Hardness of water depends on its behaviour towards soap
C
The temporary hardness is due to the presence of Ca and Mg bicarbonates
D
Permanent hardness is due to the presence of soluble Ca and Mg sulphates, chlorides and nitrates
Solution
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Correct option is D. Permanent hardness can be removed by boiling the water
Permanent hardness cannot be removed by boiling of water but temporary hardness can be removed.

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