Question

The increasing order of basic strength for the following amines in aqueous phase is
(1) aniline
(2) triethylamine
(3) ammonia
(4) triphenylamine

• A. $(1)<(4)<(3)<(2)$
• B. $(4)<(1)<(3)<(2)$
• C. $(3)<(1)<(4)<(2)$
• D. $(3)<(1)<(2)<(4)$

Answer 1

Answer: (B)

Aromatic amines are weaker bases than aliphatic amines and ammonia due to delocalization of the lone pair of electrons over the benzene ring
Hence, the order is
Triphenylamine $<$ aniline $<$ ammonia $<$ triethylamine