JEE Main & Advanced Chemistry GOC Question Bank Dipole moment, Resonance and reaction intermediates

  • question_answer Reactivity towards nucleophilic addition reaction of (I) HCHO, (II) \[C{{H}_{3}}CHO\], (III) \[C{{H}_{3}}COC{{H}_{3}}\] is [Orissa JEE 2004]

    A) II > III > I

    B) III > II > I

    C) I > II > III

    D) I > II < III

    Correct Answer: C

    Solution :

               Carbonyl carbon become more reactive toward nucleophilic addition by increasing the +I effect of alkyl group so the reactivity order is as            \[\underset{\text{I}}{\mathop{HCHO}}\,>\underset{\text{II}}{\mathop{C{{H}_{3}}CHO}}\,>\underset{\text{IIII}}{\mathop{C{{H}_{3}}COC{{H}_{3}}}}\,\]

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