1.

The oxoacid of phosphorus that reduces silver nitrate into metallic silver is

Answer»

`H_(3)PO_(2)`
`H_(4)P_(2)O_(6)`
`H_(3)PO_(4)`
`H_(4)P_(2)O_(7)`

Solution :Refer to page 11/136. Due to the presence ONE P-H bond in `H_(3)PO_(2)`, it acts as a reducing AGENT and hence reduces `AgNO_(3)` to metallic AG.


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