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this is the question given Section III paper I of IIT JEE 2010. the key are different from one another
Partial roasting of chalcopyrite produces
a. Cu2S and FeO b. Cu2O and FeO
Dear veluri
Sol: CuFeS2 + O2 → Cu2S + 2FeS + SO2
explanation
The sulphites of copper and iron are partially oxidized2FeS+ 3O2 ??→2FeO+ 2SO2 2Cu2 S + 3O2 ??→2Cu2 O + 2SO2
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answer is a)Cu2s and FeO
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