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The oxidation number of Cr in Cr(2)O(7(a...

The oxidation number of Cr in `Cr_(2)O_(7(aq))^(2-)` is?

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Verified by Experts

The correct Answer is:
`6`
`2x+(-2xx7)=-2`
`:.2x-14=-2`
`:.2x=+12`
`:.x=+6`
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