Question
The processes involved in the extraction of metals from their ores.

Answer

Metallurgy

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$\begin{array}{cc}
\ce{H}\\
|\\
\ce{H-C-H}\\
\phantom{.}\ce{H}\phantom{...} \phantom{}|\phantom{...} \phantom{}\ce{H}\phantom{.}\\
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$\begin{array}{cc}

\phantom{.}\ce{H}\phantom{...} \phantom{}\ce{H}\phantom{...} \phantom{}\ce{H}\phantom{.}\\
\phantom{}|\phantom{....} \phantom{}|\phantom{....} \phantom{}|\phantom{}\\
\ce{H-C-C-C-H}\\
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_____________________
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