Question

1-phenyl-2-chloropropane on treating with $alc.KOH$ gives mainly:

• A. 1-phenylpropene
• B. 2-phenylpropene
• C. 1-phenylpropene-2-ol
• D. 1-phenylpropene-1-ol

Answer 1

The correct option is A 1-phenylpropene

Alkyl on reacting with alcoholic KOH undergoes E2 elimination reaction.
1-pheny-2-choropropane on treating with $alc.KOH$ gives mainly 1-phenylpropene.
This is dehydrochlorination reaction.
The double bond in the product is in conjugation with benzene ring which make it more stable.