Question : In electro-refining, the pure metal is deposited on
Option 1: vessel
Option 2: electrolyte
Option 3: cathode
Option 4: anode
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Correct Answer: cathode
Solution : The correct answer is the cathode.
The anode is the impure metal to be refined in electrolytic refining, whereas the cathode is a thin strip of high-purity metal. The solution uses metal salt as the electrolyte. When an electric current passes through the electrolyte, pure metal from the anode dissolves, and deposits to form a cathode. Insoluble impurities settle to the anode's bottom and generate anode mud. The soluble impurities are re-incorporated into the mixture.
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