1.

What is the Oxidation number of sulphur in Perdisulphuric acid ?

Answer»

`+4`
`+6`
`-2`
`-1`

Solution :Structural FORMULA of perdisulphuric acid `H_(2)S_(2)O_(8)` is as below.

The two .O. atoms of peroxy bonds have (-1) OXIDATION state.
`H_(2)S_(2)O_(8)=2H+6(O)+2O` of peroxybond + 2(s)
`therefore0=2(+1)+6(-2)+2(-1)+2(S)`
`therefore` 2(S) = -12
`thereforeS=+6`


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