Carbonyl compounds are those compounds in which carbon aton is doubly bonded to oxygen atom.
The hybridization of carbon and oxygen in carbonyl compounds is Sp². Folowing are examples of carbonyl compounds,
                      Â
                        1. Ketones
                        2. Aldehydes
                        3. Carboxylic Acids
                        4. Acyl Halides
                        5. Amides
                        6. Esters
                        7. Anhydrides e.t.c
Result:
     In given the structure the carbonyl groups are highlighted RED, as shown below.