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In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with — JEE Mains Chemistry Past Papers Chemistry Question

Question

In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to: (A) remove FeO as FeSiO3 (B) separate CuO as CuSiO3 (C) decrease the temperature needed for roasting of Cu2S (D) remove calcium as CaSiO3

Answer: A

💡 Solution & Explanation

The ore is heated in a reverberatory furnace after mixing with silica. In the furnace, iron oxide ‘slags off as iron silicate FeO + SiO2  FeSiO3 (slag)

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