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Hydrocarbons — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryHydrocarbons1 Mark
MCQ
The reaction of propene with HOCl(Cl2 + H2O) proceeds through intermediate:
  • A
    $\ \ \ \ \ \ \ \ \ \ \ \ \oplus\\\text{CH}_3-\text{C}\text{H}-\text{CH}_2\text{OH}$
  • B
    $\ \ \ \ \ \ \ \ \ \ \ \ \oplus\\\text{CH}_3-\text{C}\text{H}-\text{CH}_2-\text{Cl}$
  • C
    $ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \oplus\\ \text{CH}_3-\text{CH(OH)}\text{CH}_2$
  • D
    $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \oplus\\ \text{CH}_3\text{CHCl }\text{CH}_2$
✓

Answer

  1. $\ \ \ \ \ \ \ \ \ \ \ \ \oplus\\\text{CH}_3-\text{C}\text{H}-\text{CH}_2-\text{Cl}$

Explanation:

$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ominus\\\text{HOCl}\rightarrow\text{OCH}+\text{Cl}^+$

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Canonical forms:
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$\begin{array}{*{20}{c}}
  {M{e_2}CH - CH - Me} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,\,\,\,\,\,\,OH} 
\end{array}\xrightarrow[{350{\,^o}C}]{{A{l_2}{O_3}}}(A)\xrightarrow[{(ii)\,AgOH}]{{(i)\,HI}}(B)$

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