NEET 2012 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)NEET 2012

Not in JEE Main or NEET syllabus

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

(1)Carbon monoxide (CO)
(2)Copper (I) sulphide ()Correct
(3)Sulphur dioxide ()
(4)Iron sulphide (FeS)

Answer: (2)

Solution

During roasting and smelting of copper pyrites, part of the sulphide is oxidised to . In the Bessemer converter, auto-reduction (self-reduction) takes place: $2Cu_2O + Cu_2S

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Question ID VK-091128