Question

In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with :

A. Copper (I) sulphide $$\left( {C{u_2}S} \right)$$  
B. Sulphur dioxide $$S{O_2}$$
C. Iron sulphide $$(FeS)$$
D. Carbon monoxide $$(CO)$$
Answer :   Copper (I) sulphide $$\left( {C{u_2}S} \right)$$
Solution :
Cuprous oxide formed during roasting of cuprous sulphide is mixed with few amount of cuprous sulphide and heated in a reverberatory furnace to get metallic copper.
$$2C{u_2}O + C{u_2}S \to 6Cu + S{O_2}$$

Releted MCQ Question on
Inorganic Chemistry >> Ores and Metallurgy

Releted Question 1

Copper can be extracted from

A. Kupfernical
B. Dolomite
C. Malachite
D. Galena
View Answer
Releted Question 2

In the alumino-thermite process, aluminium acts as

A. an oxidizing agent
B. a flux
C. a reducing agent
D. a solder
View Answer
Releted Question 3

The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is

A. $$C{u_2}O + FeS$$
B. $$FeSi{O_3}$$
C. $$CuFe{S_2}$$
D. $$C{u_2}S + FeO$$
View Answer
Releted Question 4

Which of the following process is used in the extractive metallurgy of magnesium?

A. fused salt electrolysis
B. self reduction
C. aqueous solution electrolysis
D. thermite reduction
View Answer

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Ores and Metallurgy

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