Question

Write down structural formulae of the first four members of the various homologous series formed by making use of the functional groups in the given table.

Hetero Atom	Functional Group
	Name	Structural formula	Condensed Structural formula
Halogen (chlorine, bromine, iodine)	Halo (chromo/bromo/iodo)	-X (-C1, -Br, -I)	- X (-C1, -Br, -I)
Oxygen	1. Alcohol	- O - H	-OH
	2. Aldehyde	O    || - C - H	-CHO
	3. Ketone	O    || - C -	-CO-
	4. Carboxylic Acid	O    || - C - O - H	-COOH-
	5. Ether	- O -	-O-
	6. Ester	O    || - C - O -	-COO-
Nitrogen	Amines	- N - H    |   H	- NH2

Answer 1

Functional group Halo -X (Cl, Br, - 1)	Functional group Aldehyde - CHO	Functional group Carboxylic acid - COOH	Functional group Amine -NH2
CH3Cl Chloromethane	HCHO Methanal	HCOOH Methanoic acid	CH3NH2 Methanamine
CH3 – CH2 – Cl Chloroethane	CH3CHO Ethanal	CH3COOH Ethanoic acid	CH3CH2NH2 Ethanamine
CH3 – CH2 – CH2 – Cl 1-Chloropropane	CH3CH2CHO Propanal	CH3CH2COOH Propanoic acid	CH3CH2CH2NH2 Propanamine
CH3 – CH2 – CH2 – CH2 – Cl 1-Chlorobutane	CH3CH2CH2CHO Butanal	CH3CH2CH2COOH Butanoic acid	CH3CH2CH2CH2NH2 Butanamine