Question

How is ethene prepared by :
(a) dehydrohalogenation reaction?
(b) dehydration reaction?
Give equations and name the products formed.

Answer 1

(a) Dehydrohalogenation reaction:

$C_2{H}_{5}Cl\stackrel{KOH\left(\text{alc. and hot}\right)}{\to }\underset{Ethene}{C_2{H}_4}+KCl+H_{2}O$

(b) Dehydration reaction:

$C_2{H}_{5}OH\underset{{3000}^{o}C}{\overset{A{l}_2{O}_3}{\to }}\underset{Ethene}{C_2{H}_4}+H_{2}O$