Pyridine is a much weaker base than aliphatic amines because :

+I effect in aliphatic amine > +I effect in aromatic amine

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+I effect in aliphatic amine < +I effect in aromatic amine

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-I effect in aliphatic amine > -I effect in aromatic amine

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-I effect in aliphatic amine < -I effect in aromatic amine

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Solution

The correct option is B +I effect in aliphatic amine > +I effect in aromatic amine
Pyridine is a weaker base than aliphatic amines due to +I effect in aliphatic amine is greater than the +I effect aromatic amine.

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Similar questions

Give plausible explanation for each of the following:

(i) Why are amines less acidic than alcohols of comparable molecular masses?

(ii) Why do primary amines have higher boiling point than tertiary amines?

(iii) Why are aliphatic amines stronger bases than aromatic amines?

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