1.

Increasing order of basic nature of NH_(3) (I), CH_(3)NH_(2) (II) "and" C_(6)H_(5)NH_(2) (III) is

Answer»

`III lt I lt II`
` I ltII lt III `
`III lt II lt I`
`I lt III lt II`

SOLUTION :Due to electron-donating inductive effect of alkyl groups and electron-withdrawing RESONANCE effect of `C_(6)H_(5)` ring, aliphatic amines are stronger BASES than `NH_(3)` while aromatic amines are WEAKER bases than `NH_(3)` .Thus, option (a) is correct.


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