Which of the following is an alkene?

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Multiple Choice

Which of the following is an alkene?

Explanation:
Alkenes have a carbon–carbon double bond, so for straight-chain (acyclic) alkenes the formula is CnH2n. With four carbons, that gives C4H8. The option showing C4H8 fits this simple pattern, pointing to an unsaturated hydrocarbon with a C=C bond. The other formulas include oxygen and belong to different families (carboxylic acids or alcohols), which do not indicate a C=C double bond. So the compound with C4H8 is the alkene.

Alkenes have a carbon–carbon double bond, so for straight-chain (acyclic) alkenes the formula is CnH2n. With four carbons, that gives C4H8. The option showing C4H8 fits this simple pattern, pointing to an unsaturated hydrocarbon with a C=C bond. The other formulas include oxygen and belong to different families (carboxylic acids or alcohols), which do not indicate a C=C double bond. So the compound with C4H8 is the alkene.

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