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Question

Among the following the strongest base is

A
C6H5NH2
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B
pNO2C6H4NH2
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C
mNO2C6H4NH2
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D
C6H5CH2NH2
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Solution

The correct option is D C6H5CH2NH2
Lone pair of electrons is reponsible for the Lewis basic nature of amino group. In benzamine (d) the lone pair is free and is not taking part in resonance, and hence most basic. In other cases, lone pair of nitrogen is part of delocalisation which decreases Lewis base strength.

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