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8.1. Aldehydes and ketones — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry8.1. Aldehydes and ketones1 Mark
MCQ
Which of the following would undergo aldol condensation
  • A
    $CC{l_3}.CHO$
  • B
    $\begin{array}{*{20}{c}}
      {\begin{array}{*{20}{c}}
      {\,\,\,\,\,C{H_3}} \\ 
      {|\,} 
    \end{array}} \\ 
      {C{H_3} - C - CHO} \\ 
      {|\,\,} \\ 
      {\,\,\,\,C{H_3}} 
    \end{array}$
  • ✓
    $C{H_3}.C{H_2}.CHO$
  • D
    $HCHO$
✓

Answer

Correct option: C.
$C{H_3}.C{H_2}.CHO$
c
$\mathop {C{H_3}}\limits^\beta - \mathop {C{H_2}}\limits^\alpha - CHO$ aldehydes having $\alpha - H$ atom can participate in aldol condensation.

The $H - $ atom attached to $\alpha $ carbon atom are called $\alpha $ - hydrogen.

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