Question

The anode and cathode used in electrolytic refining of copper respectively are:

• A. Pure copper, impure copper
• B. Impure copper, pure copper
• C. Pure copper, pure zinc
• D. Impure copper, pure zinc

Hint:

Electrolytic refining uses impure metal as the anode and pure metal as the cathode to obtain high-purity metal.

Answer 1

The Correct Option is B

Step 1: Understanding Electrolytic Refining Electrolytic refining is a process used to purify metals using electrolysis. In the case of copper, impure copper is used as the anode, and pure copper is used as the cathode. 

Step 2: Electrolysis Process 
- The impure copper anode dissolves in the electrolyte solution. 
- Copper ions \( Cu^{2+} \) migrate to the cathode, where they are reduced and deposited as pure copper. 
- Impurities either dissolve in the solution or form anode sludge.

 Step 3: Conclusion Since the impure copper is used at the anode and pure copper is deposited at the cathode, the correct answer is (2).