Which of the following will undergo aldol condensation?

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CH₂=CHCHO

CH $\equiv$ CCHO

CH₃CH₂CHO

C₆H₅CHO

answer is D.

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Detailed Solution

Aldehyde having no α hydrogen undergo Cannizaro reaction, to give one mole of carboxylic acid and one mole alcohol. If alpha hydrogen is present with respect to C=O group, then it undergoes aldol condensation.

Propanal has alpha hydrogen and undergoes carbanion formation needed to undergo aldol.

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