Question

Which of the following salt solution is used as an electrolyte in the electrolytic refining of copper metal?

• A. Copper sulphate
• B. Zinc sulphate
• C. Sodium chloride
• D. Copper metal

Answer 1

The correct option is A

Copper sulphate

Electrolytic refining is a method used to refine impure metals.

In the process of electrolytic refining, a solution of the metal salt is used as an electrolyte, and the metal ions from the anode (impure metal) dissolve into the solution and an equivalent amount of pure metal gets deposited onto the pure cathode.

Since we need copper, we use a salt solution containing copper as an electrolyte. Here, the electrolyte used is copper sulphate.