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Copper is most noble of the first row tr...

Copper is most noble of the first row transition metals and occurs in small deposits in several countries.Ores of copper include chalcanthite `(CuSO_4,5H_2O)` atacamite `(Cu_2Cl(OH)_3)`, cuprite `(Cu_2O)`, copper glance `(Cu_2S)` and malachite `(Cu_2(OH)_3CO_3)`. However, 80% of the world copper production comes from chalcopyrite `(CuFeS_2)`. The extraction fo copper from chalcopyrite involves partial roasting, removal of iron and self reduction.
Iron is removed from chalcopyrite as

A

FeO

B

`FeS^(-)`

C

`Fe_(2)O_(3)`

D

`FeSiO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
Iron is removed from chalcopyrite as slag. It being lighter floats as an immiscible layer on the top surface of `Cu_2S` (matte) and is removed though a separate hole.
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