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

  • question_answer Which amongst the following is the most stable carbocation [CBSE PMT 2005]

    A) \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{+}{\mathop{C}}}\,\ \ \ \ }}\,\]

    B) \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|\ \ }{\overset{|\ \ }{\mathop{{{C}^{+}}}}}\,\ \ }}}\,\]

    C) \[\overset{+}{\mathop{C}}\,{{H}_{3}}\]

    D) \[C{{H}_{3}}\overset{+}{\mathop{C}}\,{{H}_{3}}\]

    Correct Answer: B

    Solution :

    \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|\,}{\overset{|\,\,}{\mathop{{{C}^{+}}}}}\,\ \ \ }}}\,\] Due to (+I) effect of three methyl group 3° carbocation is more stable.

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