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How many faradays are required to reduce...

How many faradays are required to reduce, 1 mol of `Cr_(2)O_(7)^(2-)` to `Cr^(3+)` in acid medium -

A

2

B

3

C

5

D

6

Text Solution

Verified by Experts

The correct Answer is:
D
`Cr_(2)O_(7)^(2-)(aq)+14H^(+)(aq)+6erarr2Cr^(3+)(aq)+7H_(2)O(l)`
According to the equation, 6F electricity is required for the reduction of `Cr_(2)O_(7)^(2-)` ion.
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