1.

Reactio of trans 2-phynyl-1- bromocyclopentane on reaction with alcoholic KOH produces

Answer»

4-phenylchlopentene
2-phenylcyclopentene
1-phenylcyclopentene
3-phenylcyclopentene

Solution :
It's antielimination reaction so hydrogen atom from SECOND CARBON can not ELIMINATE as it is in syn-position rather hydrogen atom from `5^(th)` carbon will eliminate.


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