Select the CORRECT increasing order of boiling points of alcohols, amines and carboxylic acids of comparable…

Select the CORRECT increasing order of boiling points of alcohols, amines and carboxylic acids of comparable molar mass from the following.
  1. Alcohols $ < $ Amines $ < $ Carboxylic acids
  2. Amines $ < $ Carboxylic acids $ < $ Alcohols
  3. Amines $ < $ Alcohols $ < $ Carboxylic acids
  4. Carboxylic acids $ < $ Alcohols $ < $ Amines

Solution

$\mathrm{N}-\mathrm{H}$ bonds in amines are less polar than $\mathrm{O}-\mathrm{H}$ bond in alcohols. Carboxyl group $(-\mathrm{COOH})$ of carboxylic acid contains $\mathrm{O}-\mathrm{H}$ bond which is responsible for formation of hydrogen bonding. Strength of hydrogen bonding in carboxylic acid is greater than that of alcohols.

Asked in: MHT CET 2023 (12 May Shift 2)

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