Question

Which one of the following figures correctly describes the process of electrolytic refining?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Explanation for correct option

(C)

Electrolytic refining

• Electrolytic refining is the use of electricity to refine impure metals.
• The anode in this process is impure metal, and the cathode is a strip of pure metal.
• The electrolyte is a solution of a soluble salt of the same metal.
• Copper may be refined in this process.

Copper metal refining

• In the electrolytic refining of copper, copper sulfate is used as the cathode, while impure copper is employed as the anode.
• The anode, a pure metal sheet of copper, is where oxidation occurs.
• Copper ions are formed when electrons are lost at the anode and gained at the cathode.
• As a result, copper metal is refined.

Explanation for incorrect options

• The figures correctly describes the process of electrolytic refining is (C).
• Hence all other options (A), (D) and (D) are incorrect.

Therefore, the correct option is (C).