Question

Butylamine (I), diethyl amine (II) and N, N diethyl amine, (III) have the same molar mass. The increasing order of their boiling points is:

(a) III < II < I
(b) I < II < III
(c) II < III < I
(d) III < I < II

Answer 1

(a) III < II < I

Extent of H-bonding increases as the number of H-atoms increases and hence boiling point increases in the order 3° < 2° < 1°.