1.

The average oxidation number of iron in Fe_(3)O_(4) (ferrousferic oxide) is ____

Answer»

`+2`
`+3`
`8/3`
`2/3`

SOLUTION :Ferrousferic OXIDE is `Fe_(3)O_(4)`
`therefore3(FE)+4(O)=0`
`therefore3(X)+4(-2)=0`
`therefore3x-8=0`
`therefore3x=8`
`thereforex=8/3` OXIDATION of Fe


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