In electrolytic refining of copper, the electrolyte is a solution of
[amp_mcq option1=”acidified copper chloride.” option2=”acidified copper sulphate.” option3=”potassium chloride.” option4=”sodium sulphate.” correct=”option2″]
This question was previously asked in
UPSC NDA-1 – 2021
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.