The increasing order of the $\mathrm{pK}_{\mathrm{b}}$ of the following compound is :
Select the correct option:
A
(B) < (D) < (A) < (C)
B
(A) < (C) < (D) < (B)
C
(B) < (D) < (C) < (A)
D
(C) < (A) < (D) < (B)
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
EWG attached to benzene ring will reduce the basic strength and increase $\mathrm{pK}_{\mathrm{b}}$ while EDG decreases pKb . Correct order of $\mathrm{pK}_{\mathrm{b}}$
$$
(\mathrm{C})>(\mathrm{A})>(\mathrm{D})>(\mathrm{B})
$$
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