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How do you account for the reducing behaviour of H_(3)PO_(2) ? Or (i) Draw the structure of phosphinic acid (H_(3)PO_(2)). (ii) Write a chemical reaction for its use as a reducing agent. |
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Answer» Solution :The structure of `H_(3)PO_(2)` has two P-H bonds. Due to the presence of these P-H bonds, `H_(3)PO_(2)` acts as a strong reducing agent. For example, it reduces `AgNO_(3)` to metallic Ag and arenediazonium salt to ARENES. `{:(""4 AgNO_(3) + H_(3)PO_(2) + 2H_(2)O RARR 4 Ag + H_(3)PO_(4) + 4 HNO_(3)),(underset("Benzenediazonium chloride")(2 C_(6)H_(5)N_(2)CI)+H_(3)PO_(2)+2H_(2)O rarr underset("Benzene")(2C_(6)H_(6))+H_(3)PO_(4)+2N_(2)+2HCI):}` 
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