How copper is refined by electrolytic me...

How copper is refined by electrolytic method?

Text Solution

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Impure copper is made as anode and thin sheet of pure copper is made as cathode. Acidified copper sulphate solution is taken as electrolyte.
On passing electric current, pure copper deposits on the cathode.
At anode : `CurarrCu^(2+)+2e^(-)`
At cathode : `Cu^(2+)+2e^(-)rarrCu`

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Which alkane could not be prepared by Kolbe's electrolytic method

2C alkane

4C alkane

3C alkane

6C alkane

During the preparation of ethane by Kolbe's electrolytic method using inert electrodes the pH of the electrolytic

increases progressively as the reaction proceeds

decreases progressively as the reaction proceeds

remains constant throughout the reaction

my decrease if the concentration of the electrolyte is not very high

Silver metal is refined by

liquation

poling

van arkel method

cupellation