Which functional group is found in an ester?

ESTER IS THE COMPOUND IN WHICH OH GROUP IS REPLACED BY THE (O) in the substitution reaction.
so common formula of ester ->
RCOOR'
IN WHICH R AND R' ARE CARBON CHAINS
The functional group which is found in an ester is RCOOR'. The structure RCOR represents the ketone group, and ROH represents the alcohol group.
A Functional group may be defined as a characteristic reactive unit that has a different arrangement of atoms and possesses different properties.
RNH2 represents an amino group. In esters, the carbonyl carbon is connected to oxygen which is itself bonded to another carbon. It contains more than one alkyl group in its structure.
Therefore, the functional group which is found in an ester is RCOOR'.
To learn more about the functional groups, refer to the link:
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