Among the following, the strongest base is:

C_{6} H_{5} {N H}_{2}

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p - {N O}_{2} - C_{6} H_{4} {N H}_{2}

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m - {N O}_{2} - C_{6} H_{4} {N H}_{2}

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C_{6} H_{4} {C H}_{2} {N H}_{2}

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Solution

The correct option is D $C_{6} H_{4} {C H}_{2} {N H}_{2}$
In the compounds A,B and C, the amino group is directly attached to the benzene ring.

So, the lone pair of nitrogen is involved in resonance. So, nitrogen has a slightly positive charge. So, they all are less basic.

In compound D, the nitrogen is not involved in resonance. So, the lone pairs are not shared. They are freely present for donation.

So, the compound in D is most basic.

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