Q. In order to refine blister copper, it is melted in a furnace and is stirred with green logs of wood. The purpose is
A) To expel the dissolved gases in blister copper
B) To bring the impurities to surface and oxidize them
C) To increase the carbon content of copper
D) To reduce the metallic oxide impurities with hydrocarbon gases liberated from the wood
Explanation
(d)
$2Cu_{2}S + 3O_{2} \rightarrow 2Cu_{2}O + 2SO_{2}$
$3Cu_{2}O + CH_{4} \rightarrow 6Cu + 2H_{2}O + CO$
(from green
logs of wood)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.