Hardness of water depends on its behaviour towards soap
B
The temporary hardness is due to the presence of Ca and Mg bicarbonates
C
Permanent hardness is due to the presence of soluble Ca and Mg sulphates, chlorides and nitrates
D
Permanent hardness can be removed by boiling the water
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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.