Draw formulas for the first five members of each homologous series beginning with the following compounds.

The first five members of each homologous series beginning with the given compounds are shown as follows: 

(a) 

H–COOH : Methanoic acid 

CH3–COOH : Ethanoic acid 

CH₃–CH₂–COOH : Propanoic acid 

CH₃–CH₂–CH₂–COOH : Butanoic acid 

CH₃–CH₂–CH₂–CH₂–COOH : Pentanoic acid 

(b) 

CH₃COCH₃ : Propanone CH₃COCH₂CH₃ : 

Butanone 

CH₃COCH₂CH₂CH₃ : Pentan-2-one 

CH₃COCH₂CH₂CH₂CH₃ : Hexan-2-one 

CH₃COCH₂CH₂CH₂CH₂CH₃ : Heptan-2-one 

(c) 

H–CH=CH₂ : Ethene 

CH₃–CH=CH₂ : Propene 

CH₃–CH₂–CH=CH₂ : 1-Butene 

CH₃–CH₂–CH₂–CH=CH₂ : 1-Pentene 

CH₃–CH2–CH₂–CH₂–CH=CH₂ : 1-Hexene