In the process of electrolytic refining, impure copper acts as the anode and dissolves as Cu²⁺ ions, while pure copper acts as the cathode where Cu²⁺ ions from the electrolyte are deposited. The electrolyte needs to contain Cu²⁺ ions, which is achieved by using a solution of copper sulfate (CuSO₄). Sulfuric acid (H₂SO₄) is added to the copper sulfate solution to increase its conductivity and prevent the precipitation of copper hydroxide.
In electrolytic refining of copper, the electrolyte is a solution of
Asked in UPSC NDA 1 2021 · Topic: Metals, Minerals, Ores: Properties, Uses (Refining of metals (electrolytic refining, zone refining, liquation, distillation, vapor phase refining))
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Answer: B. acidified copper sulphate.
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