Question

Dehydration of alcohol is an example of

• A. addition reaction
• B. elimination reaction
• C. substitution reaction
  
• D. redox reaction

Answer 1

The correct option is B elimination reaction

The dehydration reaction of alcohols to generate alkene proceeds by heating the alcohols in the presence of a strong acid, such as sulfuric or phosphoric acid, at high temperatures.
Dehydration of alcohol is an E1 elimination reaction. The rate of the reaction depends on the stability of the carbocation formed.
Mechanism of dehydration of alcohol follow following steps:
Step 1: Protonation of alcohol molecule (Fast step). .
Step 2: Loss of leaving group (Slowest step).
Step 3: Loss of proton.