1.

After partial roasting, the sulphide of copper can be reduced by

Answer»

Carbon
Self-reduction
Cyanide process
Heating

Solution :(ab) `2Cu_(2)S+3O_(2)rarr 2Cu_(2)O+2SO_(2)" [Roasting]"`
(a) `Cu_(2)O+C overset("HEAT")rarr 2Cu+CO" [Reduction by carbon]"`
(b) `Cu_(2)S+2Cu_(2)Orarr 6Cu+SO_(2)" [Self - reduction]"`
(c) and (d) are not POSSIBLE.


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