Copper is the most noble of the first row transition metals and occurs in small deposits in several countries. Ors of copper include chalcanthite `(Cu
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 produces
A. `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)`
1 Answers
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`