Extraction of copper from copper pyrite ( CuFeS_2 ) involves

JEE Advanced 2016 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Advanced 2016

Extraction of copper from copper pyrite () involves

(A)crushing followed by concentration of the ore by froth-flotationCorrect
(B)removal of iron as slagCorrect
(C)self-reduction step to produce 'blister copper' following evolution of Correct
(D)refining of 'blister copper' by carbon reduction

Answer: (A),(B),(C)

Solution

(A) The sulphide ore is crushed and concentrated by froth flotation: true. (B) After roasting, iron oxide is removed by combining with silica as slag, : true. (C) In the converter, is

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Question ID VK-026565