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The oxidation number of Cr in the produc...

The oxidation number of Cr in the product of alkaline oxidative fusion of `FeCr_2O_4` is

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Verified by Experts

The correct Answer is:
6
`4FeCr_2O_4+16NaOH+7O_2to8Na_2CrO_4+2Fe_2O_3+8H_2O`
Let the oxidation state of Cr in `CrO_4^(2-)` is x.
So x+4(-2)=-2 or x=6
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