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

  • question_answer Which is the decreasing order of stability [IIT-JEE (Screening) 1993] (i) \[C{{H}_{3}}-\overset{+}{\mathop{C}}\,H-C{{H}_{3}}\] (ii) \[C{{H}_{3}}-\overset{+}{\mathop{C}}\,H-O-C{{H}_{3}}\] (iii) \[C{{H}_{3}}-\overset{+}{\mathop{C}}\,H-CO-C{{H}_{3}}\]

    A) \[(i)<(ii)<(iii)\]

    B) \[(i)>(ii)>(iii)\]

    C) \[(iii)>(ii)>(i)\]

    D)  \[(ii)>(iii)>(i)\]

    Correct Answer: B

    Solution :

    \[C{{H}_{3}}-\overset{\,\,\,+\,\,\,\,\,\,}{\mathop{\underset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,}{\mathop{CH}}\,}}\,}}\,\,>\,\,C{{H}_{3}}-\underset{OC{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,}{\overset{\,\,\,+\,\,\,\,}{\mathop{CH}}}\,\,\,\,\,}}\,>\,\,C{{H}_{3}}-\underset{COC{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{\overset{\,\,+\,\,\,\,}{\mathop{CH}}\,\,\,\,\,\,\,\,\,}}\,}}\,\]

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