Q. The total number of alkenes possible by dehydrobromination of -bromo--cyclopentylhexane using alcoholic is

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Answer: 5

Solution:

The substrate has three different types of , therefore, first three structural isomers of alkenes are expected as :
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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.