alleryA **cross aldol** condensation between benzaldehyde and acetone (excess acetone) gives, as the major product,
AAcetophenone
B4-Phenyl-3-buten-2-one
CDibenzalacetone (only)
DCinnamaldehyde
Answer & Solution
Correct answer: B. 4-Phenyl-3-buten-2-one
Acetone has $\alpha$-H, benzaldehyde does not (so benzaldehyde cannot form an enolate — only acetone can).
Excess acetone gives mono-condensation product $C_6H_5CH=CHCOCH_3$ (4-phenyl-3-buten-2-one).
With excess benzaldehyde, both methyls of acetone react to give dibenzalacetone.
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