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Copper is extracted from its sulphiate are by

$ (a)\;\text{Self reduction of the oxide and sulphide of copper} \\(b)\;\text{Electrolytic reduction} \\(c)\;\text{The carbon reduction process} \\ (d)\;\text{A displacement reaction} $
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Copper is extracted from its sulphiate are by Self reduction of the oxide and sulphide of copper
Hence a is the correct answer.
answered Mar 15, 2014 by meena.p
 

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