Which among following compounds has highest boiling point?

Which among following compounds has highest boiling point?
  1. $\mathrm{C}_4 \mathrm{H}_9 \mathrm{NH}_2$
  2. $\mathrm{C}_2 \mathrm{H}_5 \mathrm{COOH}$
  3. $\mathrm{CH}_3\left(\mathrm{CH}_2\right)_2 \mathrm{CH}_2 \mathrm{OH}$
  4. $\mathrm{C}_2 \mathrm{H}_5 \mathrm{CH}\left(\mathrm{CH}_3\right)_2$

Solution

Carboxylic acid form dimer by H-bond so it has highest bpt.

Asked in: MHT CET 2021 (22 Sep Shift 1)

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