Question

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

Answer 1

Answer: (D)

To reduce the metallic oxide impurities with hydrocarbon gases liberated from the wood

Answer 2

$2 \mathrm { Cu } _ { 2 } \mathrm {~S} + 3 \mathrm { O } _ { 2 } \rightarrow 2 \mathrm { Cu } _ { 2 } \mathrm { O } + 2 \mathrm { SO } _ { 2 }$