Q.

The reagent(s) used for softening the temporary hardness of water is (are)

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a

Ca3PO42

b

Ca(OH)2

c

Na2CO3

d

NaOCl

answer is B.

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Detailed Solution

sodium carbonate is used for removing both permanent and temporary hardnesscalcium hydroxide is used in clarkes process for removal of temporary hardness
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