JEE Main Chemistry question

Among (I) aniline, (II) *N*,*N*-diethylaniline, (III) *p*-nitroaniline and (IV) *m*-nitroaniline, the order of decreasing basicity is best described as

(A)II > I > IV > IIICorrect
(B)III > IV > I > II
(C)I > II > III > IV
(D)IV > III > II > I

Answer: (A)

Solution

*N*,*N*-Diethylaniline (II) is the most basic — its alkyl groups are electron-donating and it is sterically/electronically the least deactivated. Unsubstituted aniline (I) is next. Both nitroanilines are far less basic because –NO₂ withdraws electron density from the

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Question ID VK-140273