General Science • ChemistryHard
Which of the following organic compounds is classified as an aromatic hydrocarbon containing a benzene ring?
A. Cyclohexane
B. Toluene✓ Correct Answer
C. Hexane
D. Ethanol
💡 Solution & Explanation
Toluene is methylbenzene, an aromatic hydrocarbon featuring a benzene ring substituted with a methyl group, obeying Hückel's rule of aromaticity with four n plus two pi electrons. Cyclohexane and hexane are aliphatic cyclic and acyclic saturated hydrocarbons lacking aromatic resonance stabilization. Ethanol is an aliphatic monohydric alcohol containing a hydroxyl functional group. Aromatic compounds exhibit unique stability and undergo electrophilic substitution reactions.
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