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Q. What is the correct order of the basic strength of the following?Chemistry Question Image

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Solution:

I > II > III is the correct order of basicity. ? $ N{{O}_{2}} $ is an electron withdrawing group, thus nitro-anilines are less basic than aniline. ? (III) is less basic than (II) because $ -N{{O}_{2}} $ is closer and exerts a stronger electron withdrawing or $ -I $ -effect.