Questions
Consider the following four compounds I, II, III, and IV.
Choose the correct statement(s).
detailed solution
Correct option is C
pKb different between I and II is 0.53 and that of III and IV is 4.6.So option (2) is incorrect Correct Statement (3), (4)The most basic compound in the given option is (II) and least basic compound is (III)In 2,4,6-trinitro aniline (III) due to strong –R effect of –NO2 groups, the l.p. of –NH2 is more involved with benzene ring hence it has least basic strength.Whereas (IV) N,N-Dimethyl 2,4,6-trinitro aniline, due to steric inhibition to resonance (SIR) effect; the lone pair of nitrogen is not in the plane of benzene, hence make it (l.p.) more free to protonateSimilar Questions
In how many of the following the first one is more acidic than second one.
(1) (I) o -methyl benzoic acid ;(II) benzoic acid
(2) (I) o-methyl benzoic acid ;(II) o - hydroxy benzoic acid
(3) (I) m -chloro phenol ; (II) p -chloro phenol
(4) (I) p -chloro phenol ; (II) p - floro phenol
(5) (I) Phenol ; (II) Acetic acid
(6) (I) Formic acid ;(II) Benzoic acid
(7) (I) Benzoic acid; (II) Acetic acid
(8) (I)Phenol; (II) Carbonic acid
(9) (I) Acetic acid (II) Carbonic acid
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