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Phosphorus forms a number of oxoacids. O...

Phosphorus forms a number of oxoacids. Out of these oxoacids, phosphinic acid has strong reducing property. Write its structure and also write a reaction its reducing behaviour.

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The structure of phosphinic acid (hypophosphorus acid) is given on the R.H.S. Since it contains two P-H bonds, it acts as a strong reducing agent. For example, it reduces `AgNO_(3)` to metallic silver.
`4 AgNO_(3) + H_(3)PO_(2) + 2H_(2)O rarr 4 Ag darr + H_(3)PO_(4) + 4 HNO_(3)`
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