Question

The chemical composition of slag formed during the smelting process in the extraction of copper is

• A. $\text{Cu}_{\text{2}} \text{O} \, \text{+} \, \text{FeS}$
• B. $\text{FeSiO}_{\text{3}}$
• C. $\text{CuFeS}_{\text{2}}$
• D. $\text{Cu}_{\text{2}} \text{S} \, \text{+} \, \text{FeO}$

Answer 1

Answer: (B)

In the smelting process of copper from copper pyrites the following reactions takes place
$\text{Cu}_{\text{2}} \text{O} \, \text{+} \, \text{FeS} \rightarrow \text{Cu}_{\text{2}} \text{S} \, \text{+} \, \text{FeO}$
$\text{2FeS} \, \text{+} \, \text{3O}_{\text{2}} \rightarrow \text{2FeO} \, \text{+} \, \text{2SO}_{\text{2}}$