The functional group to which the molecule belongs is the carbonyl group.
What is a functional group?
A functional group refers to an atom, group of atoms or bond which is responsible for the chemical reactivity of a particular homologous series.
From the image of the molecule that has been shown in the question, the functional group to which the molecule belongs is the carbonyl group.
Learn more about carbonyl:https://brainly.com/question/21440134
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