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Q.
In the extraction of copper from its sulphide ore, the metal is formed by reduction of $ Cu_{2}O $ with
Uttarkhand PMTUttarkhand PMT 2011
Solution:
Copper is obtained by self-reduction or self electronation or auto reduction as shown below
$2 Cu _{2} O + Cu _{2} S \rightarrow 6 Cu + SO _{2} \uparrow$