Question : Copper is refined by
Option 1: Roasting
Option 2: Oxidation
Option 3: Electrolysis
Option 4: Zone refining
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Correct Answer: Roasting
Solution : The correct answer is Roasting.
Roasting is a significant stage in the extraction of copper from its ores in the copper refining process. Roasting is the process of heating copper ore, which includes sulphur compounds and various impurities, in the presence of air or oxygen. Sulphur compounds, which can pose issues during the later smelting process, are present in many copper ores and should be eliminated.
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