Question

The correct of increasing basic nature of the following bases is

• A. 2<5<1<3<4
• B. 5<2<1<3<4
• C. 2<5<1<4 <3
• D. 5 <2<1<4<3

Answer 1

Answer: (A)

2<5<1<3<4

Answer 2

: Presence of electron with drawing (-I or –M group) like $- NO_{2}$at p-position will decrease the basicity so (2) will be the least basic, whereas presence of electron donating

(+I or +M) group like $- OCH_{3}$ at p-position in (4) will increase the basicity so (4) will be the most basic hence correct order of increasing basic character is 2<5<1<3<4.