The increasing order of the pK_{b} of the following compound is :

a) |
(B) < (D) < (A) < (C) |
b) |
(A) < (C) < (D) < (B) |

c) |
(B) < (D) < (C) < (A) |
d) |
(C) < (A) < (D) < (B) |

The increasing order of the pK_{b} of the following compound is :

a) |
(B) < (D) < (A) < (C) |
b) |
(A) < (C) < (D) < (B) |

c) |
(B) < (D) < (C) < (A) |
d) |
(C) < (A) < (D) < (B) |

1 Answer - 5876 Votes

3537

EWG attached to benzene ring will reduce the basic strength and increase pK_{b} while EDG decreases pK_{b}. Correct order of pK_{b} (C) > (A) > (D) > (B)