MCQ
$(A)$ will be
  • A
    $\begin{array}{*{20}{c}}
    {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
    {{C_6}{H_5}CH - C{H_2}CHO}
    \end{array}$
  • $C_6H_5CH = CH -CHO$
  • C
    $C_6H_5CH_2CH_2CHO$
  • D
    Both $(b)$ and $(c)$

Answer

Correct option: B.
$C_6H_5CH = CH -CHO$
b
Aldol formed in aromatic aldehydes itself loses water molecule without heating because double bond formed is more stable due to conjugation with benzene ring. $C_6H_5CH=CHCHO$ is commonly known as cinnamaldehyde

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