identify the type of molecule shown in the picture

The molecule containing a special group attached to its side chain is a fundamental group. The molecules are acid, ether, ester, aldehyde, ketone, amine, and alcohol.
Functional groups are the specialized molecules that are attached to the main chain and vary the chemical and physical properties of the compound. The molecule containing hydroxide is acid, and the single oxygen atom is ether.
Compound with double-bonded oxygen to alkyl or aromatic group is ester, carbonyl group on carbon with hydrogen and R group is an aldehyde, carbonyl group attached to carbon-containing two alkyl or aromatic groups is a ketone.
The Amine group includes an aromatic or an alkyl group attached to two hydrogens of the nitrogen atom. The alcohol group is the attachment of the -OH group to a carbon-containing hydrogen and R group.
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