IIT JEE , AIEEE Forum - Chemistry , Organic Chemistry

dev_22oct

ans

A>C>B>D

reason:for A aliphatic amines are stronger base than the aromatic amines(K_b = 10^-4)

For C due to -I effect of oxygen e^- w'll be pulled decreasing the basicity(K_b=2 x10^-6)

For B pyridine has a pair of electron that are available for sharing with acids. (K_b =2.3 x 10^-9)

For D in pyrrole e^-s are not available for acids , as they are delocalized.

(10^-14)