Which of the following statements is correct?

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Amines have lower boiling points than nonpolar compounds of the same molar mass

Amines have higher boiling points than alcohols or carboxylic acids of comparable molar mass

Aliphatic amines are as basic as ammonia but aromatic amines are more basic

Although nitrogen in Question Image is chiral and also the mirror image of the molecule is not superimposable on / ~ R" R' the molecule itself, yet the molecule does not show optical activity.

answer is D.

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Detailed Solution

(a) Being more polar than nonpolar compounds, amines have higher boiling point. There also exist hydrogen bonds amongst amines.

(b) Amines are less polar than alcohols and carboxylic acids.

( c) Aromatic amines are less basic than ammonia and aliphatic amines. Phenyl ring being electron attractor makes lone pair on nitrogen less readily available to an acid. Aliphatic amines are more basic than ammonia.

( d) The molecule and its mirror image is rapidly interconvertible. The energy barrier between the two is very less

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