MCQ
$2,\,2-$ Dimethylpropanoic acid on heating with sodalime gives
  • A
    $\begin{array}{*{20}{c}}
      {\,\,\,\,\,C{H_3}} \\ 
      | \\ 
      {C{H_3} - C - C{H_3}} \\ 
      | \\ 
      {\,\,\,\,\,\,C{H_3}\,} 
    \end{array}$
  • B
    $\begin{array}{*{20}{c}}
      {\,\,\,\,\,\,\,C{H_3}\,} \\ 
      {|\,\,} \\ 
      {C{H_3} - C = C{H_2}} 
    \end{array}$
  • $\begin{array}{*{20}{c}}
      {\,\,\,\,\,C{H_3}\,\,} \\ 
      {|\,\,\,\,\,\,} \\ 
      {C{H_3} - CH - C{H_3}} 
    \end{array}$
  • D
    $\begin{array}{*{20}{c}}
      {\,\,\,\,\,C{H_3}} \\ 
      | \\ 
      {C{H_3} - C - C{H_3}} \\ 
      | \\ 
      {\,\,\,\,\,\,OH\,} 
    \end{array}$

Answer

Correct option: C.
$\begin{array}{*{20}{c}}
  {\,\,\,\,\,C{H_3}\,\,} \\ 
  {|\,\,\,\,\,\,} \\ 
  {C{H_3} - CH - C{H_3}} 
\end{array}$
c
$\begin{array}{*{20}{c}}
  {\begin{array}{*{20}{c}}
  {C{H_3}} \\ 
  {|\,\,\,\,\,\,\,} 
\end{array}} \\ 
  {C{H_3} - C - COOH} \\ 
  {|\,\,\,\,\,\,\,} \\ 
  {C{H_3}} 
\end{array}$ $\xrightarrow[\Delta ]{{NaOH + CaO}}$ $\begin{array}{*{20}{c}}
  {\,\,C{H_3}} \\ 
  {|\,\,\,\,} \\ 
  {C{H_3} - CH - C{H_3}} 
\end{array}$

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