Which of the following is most basic

Options

A. Benzamide
B. Butamine
C. Nitrobenzene
D. Benzene

Answer

B

Explanation

Does not show basic character because lone pair on nitrogen is delocalized by resonance with the carbonyl group which makes it less available for protonation

Butamine : `CH_(3) underset("(aliphatic primary amine)") (CH_(2) CH_(2) CH_(2) overset(..)(N)) H_(2)`
`R to NH_(2)`
R – group due to +I effect intensify the electron density on nitrogen. Therefore, highly basic in nature.

`-NO_(2)` group (-I) effect, therefore makes the ring electron deficient. Hence, acidic in nature
Benzene :