General Principles and Processes of Isolation of Elements - Result Question 10
####10. In the extraction of copper from its sulphide ore, the metal finally obtained by the reduction of cuprous oxide with :
[2012, 2015 RS]
(a) iron (II) sulphide
(b) carbon monoxide
(c) copper (I) sulphide
(d) sulphur dioxide
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Solution:
- (c) $2 Cu_2 S(s)+3 O_2(g) \to 2 Cu_2 O(s)+2 SO_2(g)$ The unchanged $Cu_2 S$, mixed with $Cu_2 O$ and heated strongly in absence of air $Cu_2 S+2 Cu_2 O \to 6 Cu+SO_2$
