The oxidation number of Cr in K2Cr2O7 i...

The oxidation number of Cr in `K_2Cr_2O_7` is

A

`+6`

B

`-7`

C

`+2`

D

`-2`

Verified by Experts

The correct Answer is:

A

`K_2overset("*")Cr_(2) O_7`
`2+2x-2xx7 =0 , 2x - 14 +2 =0`
`2x = 12 , x = (12)/2 =+6`

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