Hexanol - Names that end for -ol are from alcohols, it means that this molecule is an alcohol.
Isobutyl acetate - The structure of this name (alkyl alkylate) is proper of esters. It means this molecule is an ester.
Octanal - Names that end for -al are from aldehydes, it means that this molecule is an aldehyde.
Propanoic acid - As its name says, this molecule is a carboxylic acid.
Benzophenone - Names that end for -one are from ketones. This molecule is a ketone.
Dimethyl ether - As its name says, this molecule is an ether.
Chlorpheniramine - As its name says, this molecule is an amine.