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Question

Which of the following will cause softening of hard water?


A
Passing it through sand.
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B
Passing it through cation exchange resin.
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C
Passing it through alumina
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D
None of the above
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Solution

The correct option is B Passing it through cation exchange resin.
Passing it through cation exchange resin will cause the softening of hard water.
In cation exchange resin Mg2+ and Ca2+ (cations) are replaced by Na+ ions.

Chemistry

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