Question

When ethyl alcohol is heated with conc. $H_2SO_4$ at $443\,K$ ethylene is formed by

• A. Intramolecular hydration
• B. Intermolecular hydration
• C. Intermolecular dehydration
• D. Intramolecular dehydration

Answer 1

Answer: (D)

Intramolecular dehydration

Answer 2

Formation of an alkene from alcohol is an example of intramolecular dehydration, as $H_2O$ is lost from one molecule of ethyl alcohol.