Discussion
The maximum number of isomers for an alkene with molecular formula C4H8 is
Answer: B
There are four isomers of \(\mathrm{C_4H_8}\) that are alkenes.
They are but-1-ene, cis-but-2-ene, trans-but-2-ene and 2-methylpropene. The first and last differ in the carbon skeleton (chain isomerism), but-1-ene and but-2-ene in the position of the double bond, and the two but-2-enes are geometrical isomers. Cyclobutane and methylcyclopropane share the formula but are not alkenes.
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