A) trimethylacetaldehyde
B) acetaldehyde
C) benzaldehyde
D) formaldehyde
Correct Answer: B
Solution :
Aldol condensation is given by acetaldehyde due to the presence of cc-hydrogen atom. \[C{{H}_{3}}CHO+H.C{{H}_{2}}CHO\xrightarrow{Dil.NaOH}\] \[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ OH \\ aldol \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-CHO\]
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