NEET Chemistry Hydrogen Questions Solved


Polyphosphates are used as water softening agents because they –

(A) form soluble complexes with anionic species

(B) precipitate anionic species

(C) form soluble complexes with cationic species

(D) precipitate cationic species

(C).  Sodium hexametaphosphate-a polyphosphate, combines with cations i.e., Ca2+, Mg2+ to

        form soluble complexes.

            2Ca2++Na2Na4PO364Na++Na2Ca2PO36                                                              complex soluble

Difficulty Level:

  • 19%
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