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When white phosphorus was boiled with ca...

When white phosphorus was boiled with caustic soda a gas 'A' and the compound 'B' were obtained . When the gas 'A' was passed through `AgNO_3` solution , a block precipitate 'C' was obtained
The product 'C'

A

`+3,-3`

B

`-3,-3`

C

`-3,+1`

D

`+3,+5`

Text Solution

Verified by Experts

`underset("white")(P_4)+underset("Caustic soda")(3NaOH)+3H_2Orarrunderset(B)(NaOH_2)overset(+1)(PO_2)+overset(+3)underset(A)(PH_3)(g)`
Oxidation state of phosphorous in `PH_3 ` (A) is `-3`
Oxidation state of phosphorous in `NaH_2PO_2` is +1
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