ketone group vs chemical group

ketone group and chemical group both are nouns.

Word	Noun	Adjective	Verb	Adverb
ketone group	Yes	No	No	No
chemical group	Yes	No	No	No

As nouns, chemical group is a hypernym of ketone group; that is, chemical group is a word with a broader meaning than ketone group:

ketone group: a group having the characteristic properties of ketones
chemical group: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Other hypernyms of ketone group include group, radical.

ketone group (noun)	chemical group (noun)
a group having the characteristic properties of ketones	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule