Consider the following substances
1) 2-propanol, 2) propanone, 3) methyl amine
The correct sequence of increasing order of boiling point is

Options

A. 2 lt 3 lt 1
B. 1 lt 2 lt 3
C. 2 lt 1 lt 3
D. 3 lt 2 lt 1

Answer

A

Explanation

The high boiling point of alcohols and amines is due to intermolecular hydrogen bonding . Alcohols have higher boiling point than amines, because of more electronegativity of oxygen than nitrogen . Carbonyl compounds have no hydrogen bonding . The dipole-dipole forces of carbonyl compounds causes them to have higher boiling point but less than compounds which have intermolecular hydrogen bonding.