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The oxidation number of sulphur in H(2)S...

The oxidation number of sulphur in `H_(2)S_(2)O_(7)` and iron in `K_(4)Fe(CN)_(6)` is respectively

A

`+6` and `+2`

B

`+2` and `+2`

C

`+8` and `+2`

D

`+6` and `+4`

Text Solution

Verified by Experts

The correct Answer is:
A
`H_(2)S_(2)O_(7)`
`2xx(+1)+2xx x+7xx(-2)=0`
`+2+2x-14=0`
`2x=14-2=12`
`x=(12)/(2)=+6` for `S`
`K_(4)overset(*)(F)e(CN)_(6)`
`4xx(+1)x+6xx(-1)=0`
`4+x-6=0`
`x=6-4=+2` for `Fe`.
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