The most important copper oxide containing minerals are azurite `{Cu_(3)(OH)_(2)(CO_(3))_(2)}`, malachite `{Cu_(2)(OH)_(2)(CO_(3))}`, cuprite `(Cu_(2)
The most important copper oxide containing minerals are azurite `{Cu_(3)(OH)_(2)(CO_(3))_(2)}`, malachite `{Cu_(2)(OH)_(2)(CO_(3))}`, cuprite `(Cu_(2)O)`, tenorite `(CuO)`. Extraction of copper from these low grade ores involves leaching followed by reduction.
Some `Cu` is obtained just on leaching by dil `H_(2)SO_(4)` in :
A. Malachite
B. Tenorite
C. Cuprite
D. Azurite
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Correct Answer - C
`Cu_(3)(OH)_(2)(CO_(3))_(2)+3H_(2)SO_(4)rarr3CuSO_(4)+2CO_(2)+4H_(2)O`
`CuO+H_(2)SO_(4)rarrCuSO_(4)+H_(2)O`
`Cu_(2)O+H_(2)SO_(4)rarrCu+CuSO_(4)+H_(2)O`
`[Cu^(+)(aq) "disproportionates in aq. Solution" (Cu^(+)(aq.)rarrCu+Cu^(+2))|`
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