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AIIMS 201827 May
Exam
AIIMS
Year
2018
Date
27 May
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

AIIMS 2018 · 27 May · Chemistry · General Principles and Processes of Isolation of Metals

The first step in the extraction of copper is

The first step in the extraction of copper is

Options

  1. Areduction of copper(I) oxidewith copper(I) sulphide
  2. Breduction with iron
  3. Cheating ore with coke
  4. Droasting of copper (I) sulphide.

Correct answer

D. roasting of copper (I) sulphide.

Step-by-step solution

First step in extraction of copper from ore is roasting of sulphide ore 2Cu2 S(s)+3O2(g)→2Cu2O(s)+2SO2(g)2 \mathrm{Cu}_2 \mathrm{~S}_{(s)}+3 \mathrm{O}_{2(g)} \rightarrow 2 \mathrm{Cu}_2 \mathrm{O}_{(s)}+2 \mathrm{SO}_{2(g)}
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