The oxidation state of Cr in K ...

The oxidation state of Cr in ` K _ 2 Cr _ 2 O _ 7 ` is

A

` + 4 `

B

` + 3 `

C

` + 6 `

D

` + 5 `

Verified by Experts

The correct Answer is:

C

` K _ 2 Cr _ 2 O _ 7 `
Let the oxidation state of Cr is x
` 2 ( + 1 ) + 2x + 7 ( - 2 ) = 0 `
` + 2 + 2x - 14 = 0 `
` 2x - 12 = 0 `
` x = + 6 `

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