Among the following the most basic is

Options

A. `C_(6)H_(5)NH_(2)`
B. `(C_(6)H_(5))_(2)NH`
C. `C_(6)H_(11)NH_(2)`
D. `NH_(3)`

Answer

C

Explanation

The decreasing order of basicity is
Cyclohexy1 `-NH_(2)gtNH_(3)gtC_(6)H_(5)NH_(2)gt(C_(6)H_(5))_(2)NH`
Aromatic amines are much less basic than alkylamines because the electron density from the lone pair of electrons (on the N atom) is delocalized into the ring (mainly to the ortho and para positions)
An increase in the number of phenyls bonded to `N` increases delocalization and decreases basicity In cyclohexy `1-NH_(2)`
`(C_(6)H_(11)NH_(2))` the electron density is localized and enhanced further by the+ I effect of the ring and thus this amine is the most basic
.