Question
Chemistry Question on Isomerism
Which one of the following compounds shows cis-trans isomerism?
A
Pent-l-ene
B
But-2-ene
C
But-l-ene
D
Propene
Answer
But-2-ene
Explanation
Solution
But-2-ene shows cis-trans isomerism. These are as following: 
while other compounds pent-1-ene, but-1-ene, propene and ethene do not show cis-tr??s isomerism.