A) 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
Correct Answer: D
Solution :Permanent hardness cannot be removed by boiling of water but temporary hardness can be removed.
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