Question 8
Identify the functional groups in the following compounds
The functional groups present in the given compounds are:
(a) Aldehyde (-CHO),
Hydroxyl (-OH),
Methoxy (-OMe),
C=C double bond 
(b) Amino (-NH2); primary amine,
Ester (-O-CO-),
Triethylamine (N(C2H5)2); tertiary amine
(c) Nitro (-NO2),
C=C double bond 