`H_3 PO_3`, phosphorus acid is
`H_3 PO_3`, phosphorus acid is
A. a diprotic acid
B. a triprotic acid
C. a monoprotic acid
D. not acidic
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Correct Answer - A
`H_(3)PO_(3)` is a diprotic acid as it give only two `H^(+)` ions on dissociation.
`{:(" O"),(" ||"),(" P"),(" / | "),(" HO OH H"):}`
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