1.

In basicity of aniline is weaker in comparison to that of methylamine due to

Answer»

hyperconjugative effect of Me group of `MeNH_(2)`
resonance effect of phenyl group in aniline
lower molecular mass of methylamine as compared to that of aniline
resonance effect of `-NH_(2)` group in `MeNH_(2)`

Solution :The lone pair of electrons of NITROGEN atom in aniline takes part in resonance and THUS is not AVAILABLE for donation to protons. Thus aniline is less basic than `CH_(3)NH_(2)` in which `CH_(3)` group exhibits +I effect


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