Question

Arrange the following according to their increasing order of boiling points.

• A. C₂H₅NH₂<C₃H₈<HCOOH<C₂H₅OH
• B. C₂H₅OH<C₂H₅NH₂<C₃H₈<HCOOH
• C. C₂H₅NH_2<C₃H₈<C₂H₅OH<HCOOH
• D. C₃H₈<C₂H₅NH₂<C₂H₅OH<HCOOH

Answer 1

The correct option is D

C₃H₈<C₂H₅NH₂<C₂H₅OH<HCOOH

The electronegativity of nitrogen is lower than that of the oxygen therefore amines form weaker H-bonds as compared to alcohol and carboxylic acids and are not much associated , hence the boiling points are lower than alcohols and acids.