Arrange the following in increasing order of their basic strength.

(i) As the positive inductive effect increases basic strength as the density of the lone pair of electrons increases. When the amine group is attached to resonance with Benzene then the lone pair of N migrates on to the Benzene ring thus there will be no further movement of electrons. Hence, basicity decreases.

The increasing order of basicity is

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ii) The basicity also decreases when electron withdrawing groups like are attached to the Benzene ring. Further, as the positive inductive effect increases basic strength as the density of the lone pair of electrons increases. When the amine group is attached to resonance with Benzene then the lone pair of N migrates on to the Benzene ring thus there will be no further movement of electrons. Hence, basicity decreases.Therefore, the order of basicity will be: