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1000 ml 2 M CuSO(2) is electolyses by a...

1000 ml 2 M `CuSO_(2)` is electolyses by a current of 9.65 amp for 2 hour which is //are correct?

A

afterelectrolysis remaining concentration of `Cu^(+2)` is 1.64 M using Cu electrode

B

After electrolysis remaining concentratin of `Cu^(+2)` is 1.64 M using Pt electrode

C

When remaining coincentration of `Cu^(+2)` is 1822 then volume of solution si reduced by 10% using Pt electrode

D

17.15 gm copper deposit when current efficiency is 75% using copper electrode

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