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Oxidation numbers of P in PO4^(3-), of ...

Oxidation numbers of P in ` PO_4^(3-)`, of S in ` SO_4^(2-)`, and that of `Cr` in ` Cr_2O_7^(2-)` are respectively ,

A

`-3`, `+6`, `+6`

B

`+5`, `+3`, `+6`

C

`+3`, `+6`, `+5`

D

`+5`, `+6`, `+6`

Text Solution

Verified by Experts

The correct Answer is:
D
Oxidation no. in each case.
`PO_(4)^(3-)`
`x+4(-2)= -3x=+5`
`SO_(4)^(2-)`
`x+(-2xx4)= -2`
`x-8= -2`
`x = -2+8x= +6`
`Cr_(2)O_(7)^(2-)`
`2x+(-2xx7)= -2`
`2x-14= -2`
`2x= -2+14`
`2x=12`
`x=+6`
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