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Question

Which cyclic alkene can show geometrical isomerism?

A
Cyclopropene
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B
Cyclohexene
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C
Cyclopentene
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D
Cyclodecene
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Solution

The correct option is D Cyclodecene
Generally cyclic alkenes (having smaller size) can not exhibit geometrical isomerism due to hindered rotation of bonds.
But cyclodecene can show geometrical isomerism, because being large in size it bonds can twist. Cycloalkenes with 8 or more carbons in carbon ring exhibit geometrical isomerism.

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