Q. Which of the following is strongest base?
A) $C_{6}H_{5}NH_{2}$
B) $p - NO_{2} - C_{6}H_{4}NH_{2}$
C) $m - NO_{2} - C_{6}H_{4}NH_{2}$
D) $C_{6}H_{5}CH_{2}CH_{2}$
Explanation
(b)
Aliphatic amines (in which amino group is attached with alkyl group) are more basic than aromatic amines (in which amino group is bonded directly with benzene nucleus). Hence, $C_{6}H_{5}CH_{2}NH_{2}$ (benzyl amine), being an aliphatic amine, is the most basic among the given the compounds.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.