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

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 produces

A

`Cu_(2) S` and `FeO`

B

`Cu_(2) O` and `FeO`

C

`Cu_(2) O` and `Fe_(2) O_(3)`

D

`CuS` and `Fe_(2) O_(3)`.

Text Solution

Verified by Experts

The correct Answer is:
A
During partial roasting, `CuFeS_(2)` is first converted to `Cu_(2)S` and `FeS`. Further, as iron is more reactive than copper, `FeS` is preferentially oxidised to `FeO`. This partial roasting of chalcopyrite produces `Cu_(2)S` and `FeO`.
`CuFeS_(2) + O_(2) overset (Delta)rarr Cu_(2)S + 2FeS + So_(2)`
`2FeS + O_(2) overset (Delta)rarr Cu_(2)S + 2FeS + SO_(2)`.
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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. Iron is removed from chalcopyrite as.

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. In self-reduction, the reducing species is.

Knowledge Check

  • In the extraction of copper from its sulfide ore, the metal is formed by the reduction of Cu_2O with

    A
    `FeS`
    B
    `CO`
    C
    `Cu_2S`
    D
    `SO_2`

  • In the extraction of copper from its sulfide ore, the metal is formed by the reduction of Cu_2O with

    A
    `FeS`
    B
    `CO`
    C
    `Cu_2S`
    D
    `SO_2`

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