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The number of moles of electron required...

The number of moles of electron required to reduce 0.2 mole of `Cr_(2)O_(7)^(2-)` to `Cr^(3+)`

A

6

B

1.2

C

0.6

D

12

Text Solution

Verified by Experts

The correct Answer is:
B
`Cr_(-2)O_(7)^(2-)+14H^(+)+6e^(-)to2Cr^(3+)+7H_(2)O`
1-6
0.2 - x`implies` 1.2
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