The strongest base among the following is

Options

A. `C_(6)H_(5)NH_(2)`
B. `(C_(6)H_(5))_(2)NH`
C. `NH_(3)`
D. `(C_(2)H_(5))_(2)NH`

Answer

D

Explanation

`(C_(2)H_(5))_(2)overset(..)(N)H` (`2^(@)` amine) is strongest base.
basic nature of amines due to presences of lone pair of electron on nitrogen atom which is available for the bond formation with Lewis acid. Due to the `+I` effect `2^(@)` amine is better base then `1^(@)` amine adn `NH_(3)`. In case of aromatic amines the lone pair on nitrogen atom involved in resonance, therefore, not available for bond formation, so aromatic amines are less basic.