Question

Ethylene can be obtained by dehydration of with concentrated $H_2{\mathrm{SO}}_4$ at $160-170°C$.

• A. $C_2{H}_5\mathrm{OH}$
• B. ${\mathrm{CH}}_3\mathrm{OH}$
• C. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}$

Answer 1

The correct option is A $C_2{H}_5\mathrm{OH}$

Alcohols on heating with strong dehydrating agents like concentrated sulphuric acid form alkenes with the elimination of water as follows:
${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\underset{160-170°C}{\overset{\mathrm{conc}.H_2{\mathrm{SO}}_4}{\to }}{\mathrm{CH}}_2={\mathrm{CH}}_2+H_{2}O$