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Extraction of copper from copper pyrite (CuFeS2) involves           (JEE Adv. 2016)
  • a)
    crushing followed by concentration of the ore by frothflotation
  • b)
    removal of iron as slag
  • c)
    self-reduction step to produce ‘blister copper’following evolution of SO2
  • d)
    refining of ‘blister copper’ by carbon reduction
Correct answer is option 'A,B,C'. Can you explain this answer?
Verified Answer
Extraction of copper from copper pyrite (CuFeS2) involves (JEE Adv...
CuFeS2
(A) The ore contains sulphide ions so in the purification, concentration is done by froth-floatation process.
(B) 2CuFeS2 + O2 → Cu2S + 2FeS + SO2
2FeS + 3O2  →  2FeO + 2SO2

(C) 2Cu2S + 3O2  →  2Cu2O + 2SO2 (Partialoxidation)

(D) Copper is refined by electrolytic refining
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Most Upvoted Answer
Extraction of copper from copper pyrite (CuFeS2) involves (JEE Adv...
Copper matte, followed by electrolytic refiningd)roasting followed by reduction with carbon
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Extraction of copper from copper pyrite (CuFeS2) involves (JEE Adv. 2016)a)crushing followed by concentration of the ore by frothflotationb)removal of iron as slagc)self-reduction step to produce ‘blister copper’following evolution of SO2d)refining of ‘blister copper’ by carbon reductionCorrect answer is option 'A,B,C'. Can you explain this answer?
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