1.

For `10^(-2) (M) H_(3)PO_(3)` solution which of the following relations is correct?A. `[H_(3)PO_(3)]+[H_(2)PO_(3)^(-)]+[HPO_(3)^(2-)]+[PO_(3)^(2-)]=10^(-2)`B. `[H_(3)PO_(3)]+[H_(2)PO_(3)^(-)]+[HPO_(3)^(2-)]=10^(-2)`C. `[H_(2)PO_(3)^(-)]+[HPO_(3)^(2-)]+[PO_(3)^(3-)]=10^(-2)`D. `[H_(3)PO_(3)]+[H_(2)PO_(3)^(-)]+2[HPO_(3)^(2-)]=10^(-2)`

Answer» Correct Answer - B
`H_(3)PO_(3) oversetlarrtoundersetH_(2)PO_(3)^(-)+H^(+)`
`H_(2)PO_(3) oversetlarrtounderset HPO_(3_^(2-))+H^(+)`
`H_(3)PO_(3)` is a dibasic acid.


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