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Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

1. Structure (a)
2. Structure (b)
3. Structure (c)
4. Structure (d)

Correct answer: Structure (b)

Solution

Cyclohexanone undergoes aldol condensation to form a β-hydroxyketone intermediate, which upon heating undergoes dehydration to yield an α,β-unsaturated ketone. This matches structure (b).

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