what is meant by self reduction ? explain giving an example
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Copper (Cu) ore. In the extraction of Cu, from its sulphide ore, the ore is subjected to partial roasting in air to give its oxide. 2Cu2S + 3O2 →2CuO +2SO2. When the supply of air is stopped and the temperature is raised, the rest of the sulphide reacts with oxide and forms the metal.
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