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Why does H(3)PO(2) behave as reducing ag...

Why does `H_(3)PO_(2)` behave as reducing agent?

Text Solution

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(1) Hypophosphorus acid or phosphinic acid, `H_(3)PO_(2)` has one `P-OH` bond, one `P=O` bond and two `P-H` bonds.

(2) The acids of phosphorus which contain `P-H` bonds have strong reducing tendency.
(3) Since hypophosphorus acid has `2P-H` bonds, it is a storng reducing agent and reduces `AgNO_(3)` to metallic silver.
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Knowledge Check

  • In which of the following reaction does H_(2)O_(2) acts as a reducing agent?

    A
    `2FeCl_(2)+2HCl+H_(2)O_(2)to2FeCl_(3)+2H_(2)O`
    B
    `Cl_(2)+H_(2)O_(2)to2HCl+O_(2)`
    C
    `2HI+H_(2)O_(2)to2H_(2)O+I_(2)`
    D
    `H_(2)SO_(3)+H_(2)O_(2)toH_(2)SO_(4)+H_(2)O`

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