Which one of the following reactions does not occur during extraction of copper?
Solution
$$
\begin{aligned}
& \mathrm{CuFeS}_2+\mathrm{O}_2 \stackrel{\text { Partial roasting }}{\longrightarrow} \\\\
& \mathrm{Cu}_2 \mathrm{~S}+\mathrm{FeO}+\mathrm{SO}_2+\underset{\text { very small }}{\mathrm{FeS}}+\underset{\text { very small }}{\mathrm{Cu}_2 \mathrm{O}} \\\\
& \mathrm{Cu}_2 \mathrm{~S}+\mathrm{O}_2 \rightarrow \mathrm{Cu}_2 \mathrm{O}+\mathrm{SO}_2 \\\\
& \mathrm{FeS}+\mathrm{O}_2 \rightarrow \mathrm{FeO}+\mathrm{SO}_2 \\\\
& \mathrm{FeO}+\mathrm{SiO}_2 \rightarrow \mathrm{FeSiO}_3
\end{aligned}
$$<br/><br/>
No formation of calcium silicate $\left(\mathrm{CaSiO}_3\right)$ in extraction of $\mathrm{Cu}$.
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
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