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Learn Intext Exercise 12.3 with Free Lessons & Tips

Download Solutions as PDF

Arrange the following compounds in increasing order of their boiling points.

CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3

The molecular masses of the given compounds are in the range 44 to 46. CH3CH2OH undergoes extensive intermolecular H-bonding, resulting in the association of molecules. Therefore, it has the highest boiling point. CH3CHO is more polar than CH3OCH3 and so CH3CHO has stronger intermolecular dipole − dipole attraction than CH3OCH3⋅ CH3CH2CH3 has only weak van der Waals force. Thus, the arrangement of the given compounds in the increasing order of their boiling points is given by:

CH3CH2CH3 < CH3OCH3 < CH3CHO < CH3CH2OH

Comments
Preeti Jha
All Exercises - Chapter 12 - Aldehydes, Ketones and Carboxylic Acids
Intext Exercise 12.1
Intext Exercise 12.2
Intext Exercise 12.3
Intext Exercise 12.4
Intext Exercise 12.5
Intext Exercise 12.6
Intext Exercise 12.7
NCERT Exercise 12
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