Is aldehyde unsaturated

No, aldehydes are not considered unsaturated compounds. Aldehydes contain a carbonyl group, which consists of a carbon atom double-bonded to an oxygen atom. Unsaturated compounds typically refer to molecules that contain double or triple bonds between carbon atoms, such as alkenes or alkynes. Aldehydes, on the other hand, have a single bond between the carbonyl carbon and another carbon atom or hydrogen.