In the reaction $\underset{\substack{\text { (Vapour) }}}{\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}}…
In the reaction $\underset{\substack{\text { (Vapour) }}}{\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}} \underset{300^{\circ} \mathrm{C}}{\stackrel{\mathrm{Cu}}{\longrightarrow}} X$. The molecular formula of $X$ is
$\mathrm{C}_4 \mathrm{H}_6 \mathrm{O}$
$\mathrm{C}_4 \mathrm{H}_{10} \mathrm{O}$
$\mathrm{C}_2 \mathrm{H}_4 \mathrm{O}$
$\mathrm{C}_2 \mathrm{H}_6$
Solution
Alcohols are oxidised by hot copper to give aldehydes.
$\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH} \frac{\mathrm{Cu}}{300^{\circ} \mathrm{C}} \underset{\text { Acetaldehyde }}{\mathrm{CH}_3 \mathrm{CHO}} \text { or } \mathrm{C}_2 \mathrm{H}_4 \mathrm{O}$