Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ors of copper include chalcanthite `(CuSO_(4).5H_(2)O)` , atacamite `(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, removla 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)`

Copper is the most noble of the first row transition metals and occurs

1.	Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ors of copper include chalcanthite `(CuSO_(4).5H_(2)O)` , atacamite `(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, removla 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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