p-Block elementsHard

Question

Which of the following acids is monobasic ?

Options

A.Hypophosphorous acid (H3PO2)
B.Orthophosphoric acid (H3PO4)
C.Pyrophosphoric acid (H4P2O7)
D.Hypophosphoric acid (H4P2O6)

Solution

   Hypophosphorous acid (H3PO2)
It has one replaceable hydrogen.

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