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KCET2020ChemistryGeneral Principles and Processes of Isolation of Metals

Copper is extracted from copper pyrites by

Options

  1. Athermal decomposition
  2. Breduction by coke
  3. Celectrometallurgy
  4. Dauto reduction

Correct answer

D. auto reduction

Step-by-step solution

Copper is extracted from copper pyrites by auto reduction process in the following manner. aligned 2 CuFeS ₂+ O ₂ & Cu ₂ ~S +2 FeS + SO ₂ 2 FeS +3 O ₂ & 2 FeO +2 SO ₂ FeO + SiO ₂ & FeSiO ₃ 2 Cu ₂ ~S +3 O ₂ & 2 Cu ₂ O +2 SO ₂ 2 Cu ₂ O + Cu ₂ ~S 6 Cu + SO ₂ aligned

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