1.

Among the following compounds C_(5)H_(7)NH_(2),NH_(3),CH_(3)NH_(2),C_(2)H_(5)NH_(2) and C_(6)H_(5)NH, the least basic compound is

Answer»

`C_(3)H_(7)NH_(2)`
`NH_(3)`
`CH_(3)NH_(2)`
`C_(6)H_(5)NH_(2)`

Solution :`C_(6)H_(5)NH_(2)` is least basic compound DUE to RESONANCE by which the lone PAIR of nitrogen TAKES part in resonance `&` due to unavailability of lone pair on N. Aniline become less basic. The lone pair of N is delocalized into benzene ring by resonance


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