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STD 11 - 8.4. Organic chemistry reaction mechanism — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 8.4. Organic chemistry reaction mechanism4 Marks
MCQ
The correct stability order of the given canonical structures is
  • A
    $I > II > III$
  • ✓
    $III > I > II$
  • C
    $I > III > II$
  • D
    $II > III > I$
✓

Answer

Correct option: B.
$III > I > II$
b
$(b)$ Structure $III$ & $I$ has complete octet for all atoms but $III$ is more stable  than $I$ because  $N^{\oplus} > O^{\oplus}$ is the stability order.

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$\begin{matrix}
   \,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}  \\
   ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,  \\
   C{{H}_{3}}-C-C{{H}_{2}}-C-CHO  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|  \\
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