Final answer:
Propylbenzene is an organic compound consisting of a benzene ring with a propyl group as a substituent, which is part of the alkylbenzenes family in aromatic chemistry.
Step-by-step explanation:
Propylbenzene is a combination of a benzene ring plus a propyl group (CH3CH2CH2).
Benzene is the parent compound for many aromatic compounds, featuring a six-carbon ring with alternating double bonds. In the case of propylbenzene, a propyl chain is attached to the benzene ring, taking the place of one hydrogen atom. This organic compound belongs to a family of hydrocarbons known as alkylbenzenes.