Which of the following reactions does no...

Which of the following reactions does not involve either oxidation or reduction ?

A

`VO^(2+)rarrV_(2)O_(3)`

B

`NararrNa^(o+)`

C

`CrO_(4)^(2-)rarrCr_(2)O_(7)^(2-)`

D

`Zn^(2+)rarrZn`

Verified by Experts

The correct Answer is:

C

`overset(+6)(Cr)O_(4)^(2-)rarroverset(+6)(Cr_(2))O_(7)^(2-)`
Since oxidation state of `Cr` in both reactant and product is same.

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