Question

The total number of alkenes possible by dehydrobromination of $3$-bromo-$3$-cyclopentylhexane using alcoholic $KOH$ is

Answer 1

Answer: 5

The substrate has three different types of $B-H$, therefore, first three structural isomers of alkenes are expected as :

The last two alkenes II and III are also capable of showing geometrical isomerism, hence two geometrical isomers for each of them will be counted giving a total of five isomers.