1.

One Faraday of electricity is passed through molten Al_(2)O_(3), aqueous solution of CuSO_(4) and molten NaCl taken in three different electrolytic cells connected in series . The mole ratio of Al , Cu and Na deposited at the respective cathode is :

Answer»

`2: 3: 6`
`6 : 2 : 3`
`6 : 3 : 2 `
`1 : 2 : 3`

SOLUTION :(a) `Al^(3+)+underset(1F)underset(3F)3e^(-) to nderset(1//3"mol")underset(1"mol")(Al)`
`Cu^(2+)+underset(1F)underset(2F)2E^(-) to underset(1//2mol)underset(1mol)(Cu)`
`Na^(+)+underset(1F)e^(-) to underset(1mol)(Na)`
Mole RATIO of Al, Cu and Nadeposited at the respective CATHODES is :
`1//3 : 1//2 : 1//1 "or"2:3:6`


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