Question

Which of the following compounds will undergo self-aldol condensation in the presence of cold dilute alkali?

Options

• CH₂ = CH – CHO

• CH ≡ C – CHO

• C₆H₅CHO

• CH₃CH₂CHO

Answer 1

CH₃CH₂CHO

Explanation:

Only aldehydes or ketones with an α-hydrogen atom on a saturated carbon atom give aldol condensation; α-H on unsaturated carbon atoms cannot be easily removed by a base.