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NEET2012ChemistryGeneral Principles and Processes of Isolation of MetalsActual

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with

Options

  1. Acopper (I) sulphide ( Cu ₂ ~S )
  2. Bsulphur dioxide ( SO ₂ )
  3. Ciron sulphide (FeS)
  4. Dcarbon monoxide (CO)

Correct answer

A. copper (I) sulphide ( Cu ₂ ~S )

Step-by-step solution

In the extraction of copper from its sulphide ore, when ore is subjected to roasting, some of it is oxidised to Cu ₂ O which reacts with the remaining Cu ₂ ~S (sulphide ore) to give copper metal. Cu ₂ ~S +2 Cu ₂ O 6 Cu + SO ₂ In this process Cu ₂ ~S behaves as reducing agent.

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