p-Block elementsHard

Question

Calgon (sodium metaphosphate, (NaPO3)n) finds application as :

Options

A.artificial jewel
B.paint
C.a resin
D.water softener

Solution

It sequesters Ca2+ and Mg2+ (present in hard water) and forms soluble complex with Ca2+ and Mg2+ which do not precipitate with CO32- and soap

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