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Question: When 2-bromobutane reacts with alcoholic KOH, the reaction is called....

When 2-bromobutane reacts with alcoholic KOH, the reaction is called.

A

Halogenation

B

Hydrogenation

C

Chlorination

D

Dehydro-halogenation

Answer

Dehydro-halogenation

Explanation

Solution

CH3−CH∣Br−CH2−CH3→alc.KOHCH3CH=CHCH32-buteneCH_{3} - \underset{\underset{Br}{|}}{CH} - CH_{2} - CH_{3}\overset{\quad alc.KOH\quad}{\rightarrow}\underset{\text{2-butene}}{CH_{3}CH = CHCH_{3}}

The reaction is dehydrohalogenation.