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JEE Main202330 Jan 2023Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to:

Options

  1. Aseparate CuO as CuSiO 3
  2. Bremove calcium as CaSiO 3
  3. Cdecrease the temperature needed for roasting of Cu 2 S
  4. Dremove FeO as FeSiO 3

Correct answer

D. remove FeO as FeSiO 3

Step-by-step solution

In actual practice, the ore is heated in reverberatory furnace after mixing with silica. In the furnace, iron oxide 'slags off' as iron silicate and copper is produced in the form copper matte. This contains Cu 2 S and FeS . FeO + SiO 2 ⟶ FeSiO 3

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