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NEET 2012
Exam
NEET
Year
2012
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

NEET 2012 · Chemistry · General Principles and Processes of Isolation of Metals

In the extraction of copper from its sulphide ore, the metal is...

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 (Cu2 S)\left(\mathrm{Cu}_2 \mathrm{~S}\right)
  2. Bsulphur dioxide (SO2)\left(\mathrm{SO}_2\right)
  3. Ciron sulphide (FeS)
  4. Dcarbon monoxide (CO)

Correct answer

A. copper (I) sulphide (Cu2 S)\left(\mathrm{Cu}_2 \mathrm{~S}\right)

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 Cu2O\mathrm{Cu}_2 \mathrm{O} which reacts with the remaining Cu2 S\mathrm{Cu}_2 \mathrm{~S} (sulphide ore) to give copper metal. Cu2 S+2Cu2O⟶6Cu+SO2↑\mathrm{Cu}_2 \mathrm{~S}+2 \mathrm{Cu}_2 \mathrm{O} \longrightarrow 6 \mathrm{Cu}+\mathrm{SO}_2 \uparrow In this process Cu2 S\mathrm{Cu}_2 \mathrm{~S} behaves as reducing agent.
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