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Three mole of electrons are passed throu...

Three mole of electrons are passed through three solutions in succession containing `AgNO_(3), CuSO_(4)` and `AuCl_(3)` respectively. The ratio of amounts of cations reduced at cathode will be :

A

`1 : 2 : 3`

B

`2 : 1 : 3`

C

`3 : 2 : 1`

D

`6 : 3 : 2`

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The correct Answer is:
D
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