Which among the following amines has highest value of $\mathrm{pK}_{\mathrm{b}}$ ?

Which among the following amines has highest value of $\mathrm{pK}_{\mathrm{b}}$ ?
  1. $\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$
  2. $\left(\mathrm{CH}_3\right)_3 \mathrm{~N}$
  3. $\mathrm{CH}_3 \mathrm{NH}_2$
  4. $\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$

Solution

$\mathrm{C}_6 \mathrm{H}_5 \mathrm{NH}_2$ has the highest value of pKb

Asked in: MHT CET 2023 (11 May Shift 1)

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