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Which substance is serving as a reducing...

Which substance is serving as a reducing agent in the following reaction?
`14H^(+)+Cr_(2)O_(7)^(2-)+3Ni rarr 2Cr^(3+)+7H_(2)O+3Ni^(2+)`

A

`H_2O` alone

B

Ni

C

`H^(+)`

D

`Cr_2O_7^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
B
The oxidation number of Ni changes from 0 to +2
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