Q.

Consider the following compound and identify the false statement about it.

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a

-NH2 group in this compound exhibits both - I and + M effects

b

It is a pleasant smelling compound

c

It is a weaker base than Ammonia in aqueous solution

d

It turns reddish brown on atmospheric oxidation

answer is B.

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Detailed Solution

The compound is Aniline;-NH2 group is attached to conjugated system. Lone pair is in conjugation with pi bonds. Thus it shows + M effect.Nitrogen is more electronegative than  sp2  carbon. Thus it shows  - I effect.Aniline has fishy odour.Due to resonance , lone pair is less available for donation. Thus  Aniline  is less basic than Ammonia.Aniline is highly susceptible to atmospheric oxidation and turns reddish brown.
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