InterviewSolution
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InterviewSolution
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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 :A. `2: 3: 6`B. `6 : 2 : 3`C. `6 : 3 : 2 `D. `1 : 2 : 3` |
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Answer» Correct Answer - A (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 Na deposited at the respective cathodes is : `1//3 : 1//2 : 1//1 "or" 2:3:6` |
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