Recall the first four members of a homologous series of alcohols as methanol, ethanol, propanol and butanol.

The first four members of the homologous series of alcohols are methanol, ethanol, propanol, and butanol. Each of these alcohols contains the functional group –OH, which is responsible for their characteristic properties. Methanol (CH₃OH) is the simplest alcohol, followed by ethanol (C₂H₅OH), propanol (C₃H₇OH), and butanol (C₄H₉OH). These compounds exhibit similar chemical behavior due to their structural similarities, including their ability to form hydrogen bonds, which influences their boiling points and solubility in water.