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NTA Abhyas JEE Main2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

Copper is extracted from copper pyrites ore by heating in a blast furnace. The method is based on the principle that

Options

  1. ACopper has more affinity for oxygen than sulphur at high temperature.
  2. BIron has more affinity for oxygen than copper at high temperature.
  3. CSulphur has less affinity for oxygen at high temperature.
  4. DCopper has less affinity for oxygen than sulphur at high temperature.

Correct answer

B. Iron has more affinity for oxygen than copper at high temperature.

Step-by-step solution

Iron has greater affinity for oxygen than copper. Thus, the copper oxide reacts with iron sulphide to from iron oxide and reproduce copper sulphide. FeS + Cu 2 O ⟶ FeO + Cu 2 S

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