Which of the following oxoacide of phosphorus is a reducing agent and a monobasic acid as well?A. Orthophosphorous acid `(H_(3)PO_(3))`B. Orthophosphoric acid `(H_(3)PO_(4))`C. Hypophosphorous acid `(H_(3)PO_(2))`D. Cyclotrimetaphosphoric acid, `(HPO_(3))_(3)`

Which of the following oxoacide of phosphorus is a reducing agent and

1.	Which of the following oxoacide of phosphorus is a reducing agent and a monobasic acid as well?A. Orthophosphorous acid `(H_(3)PO_(3))`B. Orthophosphoric acid `(H_(3)PO_(4))`C. Hypophosphorous acid `(H_(3)PO_(2))`D. Cyclotrimetaphosphoric acid, `(HPO_(3))_(3)`
Answer» Correct Answer - 3 The oxoacids which contain `P-H` bond have strong reducing properties. Thus ,hypophosporous acid is a good reducing agent as it contains two `P-H` bonds. For example ,it reduces silver nitrate to metallic silver. `4AgNO_(3)+2H_(2)O+H_(3)PO_(2)rarr4Ag+4HNO_(3)+H_(3)PO_(4)` The `P-H` bonds are not ionisable to give `H^(+)` and do not play any role in basicity. Only those `H` atoms which are attached with oxygen in `P-OH` bonds are ionisable and cause bacity .Thus ,hyprophosphorous is monobasic as its structure has only one `P_OH` bond. On the other hand, `H_(3)PO_(3)` and `H_(3)PO_(4)` are dibasic and tribasic,respectively as the structure of `H_(3)PO_(3)` has two `P_OH` bonds and `H_(3)PO_(3)` three.

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Which of the following oxoacide of phosphorus is a reducing agent and a monobasic acid as well?A. Orthophosphorous acid `(H_(3)PO_(3))`B. Orthophosphoric acid `(H_(3)PO_(4))`C. Hypophosphorous acid `(H_(3)PO_(2))`D. Cyclotrimetaphosphoric acid, `(HPO_(3))_(3)`

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