1.

In order to refine "copper" it is melted in a furnace and it is stirred with green logs of wood. The purpose is :-

Answer»

to expel the dissolved gases in blister copper
to reduce the METALLIC oxide impurities with hydrocarbon gases LIBERATED from the wood
to bring the impurities to surface and OXIDISE them
to increase the CARBON content in copper

Answer :B


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