The correct answer is: A. Toluene.
Toluene is a chemical compound with the molecular formula C7H8. It is a colorless, water-insoluble liquid with a characteristic sweet smell. Toluene is a member of the aromatic hydrocarbons and is a major component of crude oil. It is used as a solvent, a fuel, and a chemical intermediate.
Phenol is a chemical compound with the molecular formula C6H5OH. It is a white, crystalline solid with a characteristic odor. Phenol is a member of the
phenols and is a weak acid. It is used as a disinfectant, a preservative, and a precursor to other chemicals.Propane is a chemical compound with the molecular formula C3H8. It is a colorless, odorless gas that is lighter than air. Propane is a member of the alkanes and is used as a fuel, a refrigerant, and a chemical intermediate.
Butane is a chemical compound with the molecular formula C4H10. It is a colorless, odorless gas that is lighter than air. Butane is a member of the alkanes and is used as a fuel, a refrigerant, and a chemical intermediate.
Toluene is the correct answer because it is the only option that is an aromatic hydrocarbon. Aromatic hydrocarbons are a class of organic compounds that are characterized by a ring of carbon atoms that is delocalized with pi electrons. This delocalization of electrons gives aromatic hydrocarbons their characteristic properties, such as their stability and their tendency to undergo substitution reactions.