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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

`Cu and FeO`

B

`Cu_2O and FeO`

C

`Cus and Fe_2O_2`

D

`Cu_2O and Fe_2O_3`

Text Solution

Verified by Experts

The correct Answer is:
B
`2CuFeS_2 + O_2 rarr Cu_2S + 2FeS + SO_2 uarr`
`2Cu_2S + 3O_2 rarr 2Cu_2O + 2SO_2 uarr`
`2FeS + 3O_2 rarr 2FeO + 2SO_2 uarr`
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