Question

Identify the correct order of boiling points of the following compounds: $CH_3CH_2CH_2CH_2OH(1) \, \, \, \, \, \, \, CH_3CH_2CH_2CHO (2)$ $CH_3CH_2CH_2COOH (3)$

• A. 1 > 2 > 3
• B. 3 > 1 > 2
• C. 1 > 3 > 2
• D. 3 > 2 > 1

Answer 1

Answer: (B)

3 > 1 > 2

Answer 2

Butanoic acid forms more exhaustive H-bonds than butanol and
butanal do not form intermolecular H-bonds. Hence, boiling
point order will be
\hspace15mm 3 > 1 > 2