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In which of the following reaction, oxid...

In which of the following reaction, oxidation number of Cr has been affected?

A

`2CrO_4^(2-) + 2H^+ to Cr_2O_7^(2-) + H_2O`

B

`Cr_2O_7^(2-) + 2OH^(-) to 2CrO_4^(2-) + H_2O`

C

`(NH_4)_2Cr_2O_7 to N_2 + Cr_2O_3 +H_2O`

D

`CrO_2Cl_2 + 2OH^(-) to CrO_4^(2-) + 2HCl`

Text Solution

Verified by Experts

The correct Answer is:
C
`overset(+6)(Cr_(2)) O_(7)^(2-) to Cr^(+3)` (In others, it is + 6 on both sides).
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