Copper is the most noble of first row transition metals and occurs in small deposits in serveral countries. Ores of copper include chalcanthite `(CuSO_(4).5H_(2)O)` atacanite `[Cu_(2)Cl(OH)_(3)]` cuprite `(Cu_(2)O)` copper glance `(Cu_(2)S)` and malachite `[Cu_(2)(OH)_(2)CO_(3)]`. However `80 %` of the world copper production comes from the ore chalcopyrite `(CuFeS_(2))`. The extraction of copper from chalcopyrite involves partial roasting removal of iron and self-reduction. Partial roasting of chalcopyrite producesA. `Cu_(2)S` and `FeO`B. `Cu_(2)O` and `FeO`C. `CuS` and `Fe_(2)O_(3)`D. `Cu_(2)O` and `Fe_(2)O_(3)`

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1.	Copper is the most noble of first row transition metals and occurs in small deposits in serveral countries. Ores of copper include chalcanthite `(CuSO_(4).5H_(2)O)`, atacanite `[Cu_(2)Cl(OH)_(3)]`, cuprite `(Cu_(2)O)`, copper glance `(Cu_(2)S)`, and malachite `[Cu_(2)(OH)_(2)CO_(3)]`. However, `80 %` of the world copper production comes from the ore chalcopyrite `(CuFeS_(2))`. The extraction of copper from chalcopyrite involves partial roasting, removal of iron and self-reduction. Partial roasting of chalcopyrite producesA. `Cu_(2)S` and `FeO`B. `Cu_(2)O` and `FeO`C. `CuS` and `Fe_(2)O_(3)`D. `Cu_(2)O` and `Fe_(2)O_(3)`
Answer» Correct Answer - B `2CuFeS_(2)+O_(2)rarrCu_(2)S +SO_(2)uarr +2FeS` `2FeS+3O_(*2)rarr 2FeO+2SO_(2)uarr` `2Cu_(2)S+3O_(2)rarr2Cu_(2)O+2SO_(2)uarr`

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