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Q.

Partial roasting of chalcopyrite produces

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a

CuS and Fe₂O₃

b

Cu₂O and FeO

c

Cu₂O and Fe₂O₃

d

Cu₂S and FeO

answer is B.

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Detailed Solution

Partial roasting of chalcopyrite involves the following reactions

2CuFeS₂ + O₂ $\to$ Cu₂S + 2 FeS + SO₂

2Cu₂S + 3O₂ $\to$ 2Cu₂O +2 SO₂

2 FeS + 3O₂ $\to$ 2 FeO + 2 SO₂

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Partial roasting of chalcopyrite produces