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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

NTA Abhyas 2020 · Chemistry · General Principles and Processes of Isolation of Metals

Copper is extracted from copper pyrites ore by heating in a blast...

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+Cu2O⟶FeO+Cu2S\text{FeS} + {Cu}_{2} \text{O} ⟶ \text{FeO} + {Cu}_{2} \text{S}
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