Question

Which of the following is a tetrabasic acid?

A
Hypophosphorous acid
B
Metaphosphoric acid
C
Pyrophosphoric acid
D
Orthophosphoric acid
Solution
Verified by Toppr

Tetrabasic acid means acids having 4 replacable hydrogen atoms.
H3PO2 hypophosphorus acid
Metaphosphoric acid(HPO3)n
Pyrophosphoric acid H4P2O7
Orthophosphoric acid H3PO4
Here, pyrophosphoric acid, H4P2O7 have 4 removable H+ ions, hence is a tetrabasic.

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