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On passing 3F electricity through three ...

On passing 3F electricity through three cells containing fused `Na_2CO_3`, fused `Cu(NO_3)_2` and fused `AI(NO_3)_3` the number of moles of the metals deposited are in the ratio.

A

`1:2:3`

B

`3:2:1`

C

`6:3:2`

D

`3:4:2`

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