Question

C6H5NH2 and CH3NH2 which is strong base and why?

Answer 1

The benzene ring in aniline is electron withdrawing in nature. It withdraws the lone pair of electrons of the nitrogen and hence, is less basic. The basic strength (of some compounds) is determined by the capacity of the compound to donate the electron pair. In methylamine, the methyl group attached is an electron donating group. It increases the electron density on the nitrogen atom. This makes the nitrogen to donate the electron more easily in methyl amine than in aniline. 
Hence, aniline is less basic than methyl amine.
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Answer 2

hey mate here is your answer...
CH3NH2 is more basic due to + I effect...
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hope it will help you my dear friend...#@@$$