The correct increasing order of the basic strength for the following compounds is:

The correct increasing order of the basic strength for the following compounds is:

1. $\mathrm{II}<\mathrm{III}<\mathrm{I}$
2. $\mathrm{III}<\mathrm{I}<\mathrm{II}$
3. $\mathrm{III}<\mathrm{II}<\mathrm{I}$
4. $\mathrm{II}<\mathrm{I}<\mathrm{III}$

Solution

$-{\mathrm{NO}}_2$ has a strong $–\mathrm{M}$ effect and $-{\mathrm{CH}}_3$ shows $+\mathrm{I}, \mathrm{HC}$ effect,
Basic strength $\propto +\mathrm{M},+\mathrm{I},\mathrm{HC}$
$\therefore$ Order of basic strength is:

Asked in: NEET 2017

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