Question

Rohit has an impure copper plate and wants to purify it by electroplating. Using an electrolytic setup, he can do this by

• A. using the impure copper plate as the positive terminal electrode.
• B. using impure copper plate as the negative terminal electrode.
• C. breaking the impure copper plate into 2 halves and using them as electrodes.
• D. simply placing the impure copper plate in the electrolyte.

Answer 1

The correct option is A using the impure copper plate as the positive terminal electrode.

Rohit can purify the copper plate and get the pure copper by using the below mentioned electrolytic setup. On using the impure copper plate as the positive terminal electrode, the metal dissolves from impure copper plate and goes in the copper sulphate solution. The dissolved metal present in the solution is deposited on the cathode and the impurities are left in the copper sulphate solution.