Q 2. Which of the following pair of compounds are homologues:-

(1) 1-Propanol & 2-Propanol                              (2) Ethanol & Propanol
(3) Acetone & Acetaldehyde                              (4) Acetic acid & Butyric acid

Dear student

2) Ethanol and Propanol are members of the homologous series of Alcohols, as the previous compound differs from the later by the addition of a CH₂ group.{which is the property of homologous series].Propanol has an extra CH₂ group compared to Ethanol.
Ethanol is CH₃CH₂OH
Propanol is CH₃CH₂CH₂OH

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