Question

4. How is ethene prepared from ethanol? Give the reaction involved in it.

Answer 1

In the presence of an excess of concentrated ${\mathrm{H}}_2{\mathrm{SO}}_4$, heating ethanol at $440\mathrm{K}$ temperature gives ethene as the major product.

The reaction involved in it is written as:

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\stackrel{\mathrm{Conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }{\mathrm{CH}}_2={\mathrm{CH}}_2+{\mathrm{H}}_2\mathrm{O}$