p-Block elementsHard

Question

Which is a set of acid salts and can react with base ?

Options

A.NaH2PO2, Na2HPO3, NaH2PO4
B.Na2HPO3, NaH2PO3, Na2HPO4
C.NaH2PO4, NaH2PO3, Na2HPO4
D.All of these 

Solution

Acid salts react with bases forming salts and water as per the reaction given below.
NaH2PO4 + NaOH → Na2HPO4 + H2O    ;    NaH2PO3 + NaOH → Na2HPO4 + H2O
Na2HPO4 + NaOH →  Na3PO4 + H2O

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