Answer
Please see the work below.
Work Step by Step
(a) Ether. Ether molecule consists of $-O-$ functional group.
(b) Amine. Amine molecule consists of $-NH_{2}$, $-NHR$ or $-NR_{2}$ functional groups.
(c) Aldehyde. Aldehyde molecule consists of $-CHO$ functional group.
(d) Ketone. Ketone molecule consists of $-CO-$ functional group.
(e) Carboxylic acid. The carboxylic acid molecule consists of a $-COOH$ functional group.
(f) Alcohol. Alcohol molecule consists of $-OH$ functional group.
(g) Amino acid. The amino acid molecule consists of $-NH_{2} and -COOH$ functional groups.
