Since this reaction takes place by free radical mechanism. Hence, there is a possibility of formation of ethane.
\(\mathop {\mathop C\limits^. {H_3} + \mathop C\limits^. {H_3}}\limits_{{\rm{Methyl free radicals}}} \to \mathop {C{H_3} - C{H_3}}\limits_{{\rm{Ethane}}} \)

$A \xrightarrow[ { Cu\; tube }]{\text { Redhot }}\mathrm{B} \xrightarrow[ Anhydrous AlCl_3]{\mathrm{CH}_{3} \mathrm{Cl}(1 \mathrm{eq}} \mathrm{C}$
($A$ એ સૌથી ઓછું પરમાણ્વીય વજન ધરાવતું આલ્કાઇન છે)