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Standard XII
Chemistry
Oxyacids of Phosphorus
Which of the ...
Question

Which of the following is a tetrabasic acid?

A
Orthophosphoric acid
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B
Orthophosphorous acid
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C
Metaphosphoric acid
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D
Pyrophosphoric acid
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Solution

The correct option is C Pyrophosphoric acid
The formula of pyrophosphoric acid is H4P2O7. It is a tetrabasic acid since it has four ionisable hydrogen atom.
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