Which of the following methods is used to obtain pure copper from impure copper? MCQ with Answer and Explanation

Which of the following methods is used to obtain pure copper from impure copper?
A. Smelting
B. Roasting
C. Electrolytic refining
D. Calcination
Answer: Option C
Solution (By JKSSB Mock Tests)
In electrolytic refining, impure copper is the anode, pure copper is the cathode, and CuSO₄ acidified with H₂SO₄ is the electrolyte. Copper dissolves from anode and pure copper deposits on cathode. Smelting is reduction with coke.

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