1.

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

Answer»

2 lt 3 lt 1
1 lt 2 lt 3
2 lt 1 lt 3
3 lt 2 lt 1

Solution :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 whichhave intermolecular hydrogen bonding.


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