A) In the case primary, secondary and tertiary amines, the basic strength depends on the extent on the extent of hydrogen bonding in the protonated amines
B) The presence of groups like $–OCH_{3}$ and $–CH_{3}$ increases the basic strength of amines
C) The presence of groups like $–NO_{2}, - CN$ and halogens reduces the basic strength of amines
D) The basic strength of amines depends on their concentration
Explanation
(d)
Concentration does not affect the basis strength of amines
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.