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How many Faraday are required to reduce ...

How many Faraday are required to reduce 1 mole of `Cr_(2)O_(7)^(2-)` to `Cr^(3+)` in acid solutions ?

A

2

B

3

C

5

D

6

Text Solution

Verified by Experts

The correct Answer is:
D
(d) The reduction reaction in the acidic medium is :
`Cr_(2)O_(7)^(2-)+14H^(+)+6e^(-) to 2Cr^(3+)+7H_(2)O`
Thus, six Faraday of charge is required.
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