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Questions  

Three reactions involving H2PO4are given below?

(i) H3PO4+H2OH3O++H2PO4

(ii) H2PO4+H2OHPO42+H3O+

(iii)H2PO4+OHH3PO4+O2

In which of the above reactions does H2PO4act as an acid?

a
(i) only
b
(ii) only
c
(i) and (ii) only
d
(iii) only

detailed solution

Correct option is B

The given reaction H2PO4+H2OHPO42+H3O+

The reaction (ii) provides H3O+. Hence, in this reaction H2PO4acts as an acid

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