Questions
Which of the following has least pKb value?
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Correct option is C
In (3), –NMe2 group is thrown out of the plane of the aromatic ring, i.e. lone pair of electrons on N atom are not involved in conjugation and hence most basic.Hence, the correct answer is (3).Similar 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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