Arrange the following in increasing order of their boiling points $\begin{array}{ccc}\text {…

Arrange the following in increasing order of their boiling points $\begin{array}{ccc}\text { N-Ethylethanamine } & \text { Butanamine } & \begin{array}{c}\text { N, N-dimethyl } \\ \text { ethanamine }\end{array} \\ \text { I } & \text { II } & \text { III }\end{array}$
  1. III $>$ II $>$ I
  2. III $>$ I $>$ II
  3. II $>$ III $>$ I
  4. II $>$ I $>$ III

Solution

The boiling point of amines increases with increasing molecular mass and with decreasing number of alkyl groups to the amino $\mathrm{N}$-atom because of $\mathrm{H}$-bonding.
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Asked in: JEE-TOPICTESTS-CHEMISTRY

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