IUPAC name of aldehyde: Suffix al is added by replacing e from the parent alkane.
HCHO, parent alkane → Methane → replace e by al → Methanal
CH3CHO, parent alkane → Ethane → replace e by al → Ethanal
IUPAC naming of ketone: Suffix one is added by replacing e from the parent alkane. For example,
C3H6O, Parent alkane → Propane → replace e by one → Propanone
In ketones, the carbonyl group is attached to two carbon atoms.
An aqueous solution of formaldehyde, called formalin is used to preserve biological specimens in the laboratories. Vanillin which is used as a flavor, also has the aldehyde functional group.
Acetone is used as a solvent and also in nail polish removers.