In acidic medium, H2 O2 changes Cr2 O7^(...

In acidic medium, `H_2 O_2` changes `Cr_2 O_7^(-2)` to `CrO_5` is which has two (- O - O -) bonds. Oxidation state of Cr in `CrO_5` is __________.

A

`+5`

B

`+3`

C

`+6`

D

`-10`

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The correct Answer is:

C

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