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7. Alcohol, phenol and ethers — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry7. Alcohol, phenol and ethers1 Mark
MCQ
In the following reaction

$\begin{matrix}
   \begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\, \,\, \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}  \\
   C{{H}_{3}}-C-CH=C{{H}_{2}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}\,\,\,\,\,\,\,\, \,\,\,\, \\
\end{matrix}\,$ $\xrightarrow{{{H}_{2}}O/{{H}^{\oplus }}}$ $\underset{Major\,\,product}{\mathop{A}}\,$ $+$ $\underset{Major\,\,product}{\mathop{B}}\,$

The major product is

  • A
    $\begin{array}{*{20}{c}}
    {C{H_3}\,\,\,\,\,\,\,\,\,}\\
    {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {C{H_3} - C - CH - C{H_3}}\\
    {\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {\,\,\,\,\,\,\,\,C{H_3}\,OH\,\,\,\,\,\,\,\,\,\,\,\,\,}
    \end{array}$
  • B
    $\begin{array}{*{20}{c}}
    {C{H_3}\,\,\,\,\,\,\,\,\,\,}\\
    {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {C{H_3} - C - C{H_2} - C{H_2}}\\
    {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
    \end{array}$
  • ✓
    $\begin{array}{*{20}{c}}
    {C{H_3}\,\,\,\,\,\,\,\,}\\
    {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {C{H_3} - C - CH - C{H_3}}\\
    {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,OH\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
    \end{array}$
  • D
    $\begin{array}{*{20}{c}}
    {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {{H_2}C - C - C{H_2} - C{H_3}}\\
    {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,OH\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
    \end{array}$
✓

Answer

Correct option: C.
$\begin{array}{*{20}{c}}
{C{H_3}\,\,\,\,\,\,\,\,}\\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{C{H_3} - C - CH - C{H_3}}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,OH\,\,\,\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$
c
$\begin{matrix}
   \begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\, \,\, \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}  \\
   C{{H}_{3}}-C-CH=C{{H}_{2}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}\,\,\,\,\,\,\,\, \,\,\,\, \\
\end{matrix}\,$ $\xrightarrow{{{H}_{2}}O/{{H}^{\oplus }}}$  $\underset{(Major\,\,product)}{\mathop{\begin{matrix}
   \begin{matrix}
   \,\,\,\,\,C{{H}_{3}}  \\
   |\,\,\,  \\
\end{matrix}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-CH-C{{H}_{3}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\, \\
   \,\,\,OH\,\,\,C{{H}_{3}}\,\,\,  \\
\end{matrix}}}\,$

$\begin{matrix}
   \begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\, \,\, \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}  \\
   C{{H}_{3}}-C-CH=C{{H}_{2}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}\,\,\,\,\,\,\,\, \,\,\,\, \\
\end{matrix}\,$  $\overset{{{H}^{\oplus }}}{\longleftrightarrow}$ $\begin{matrix}
   \begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}  \\
   {{H}_{3}}C-C-C\overset{\oplus }{\mathop{H}}\,=C{{H}_{2}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}\,\,\,\,\,\,\,  \\
\end{matrix}$

$\underset{(Major\,\,product)}{\mathop{\begin{matrix}
   \begin{matrix}
   \,\,\,\,\,C{{H}_{3}}  \\
   |\,\,\,  \\
\end{matrix}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-C-CH-C{{H}_{3}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\, \\
   \,\,\,\,\,OH\,\,\,C{{H}_{3}}\,\,\,  \\
\end{matrix}}}\,$ $\overset{{{H}_{2}}O}{\longleftrightarrow}$$\underset{{}}{\mathop{\begin{matrix}
   \,\,\begin{matrix}
   \,\,\,\,\,C{{H}_{3}}\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-\underset{\oplus }{\mathop{C}}\,-CH-C{{H}_{3}}  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}\,\,\,  \\
\end{matrix}}}\,$

$\begin{matrix}
   \begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}  \\
   {{H}_{3}}C-C-C\overset{\oplus }{\mathop{H}}\,=C{{H}_{2}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}\,\,\,\,\,\,  \\
\end{matrix}$ $\xrightarrow{\operatorname{Re}arrangment}$ $\underset{{}}{\mathop{\begin{matrix}
   \,\,\begin{matrix}
   \,\,\,\,\,C{{H}_{3}}\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   {{H}_{3}}C-\underset{\oplus }{\mathop{C}}\,-CH-C{{H}_{3}}  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}\,\,\,  \\
\end{matrix}}}\,$

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