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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 Cu2S + 2 FeS + SO2 

2Cu2S + 3O2 2Cu2O +2 SO2

2 FeS + 3O2  2 FeO + 2 SO2

 

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