Chemistry - Carbonyl compounds Question with Solution | TestHub

Aldehydes and ketones having at least one $\alpha$-hydrogen atom in presence of dilute alkali give $\beta$-hydroxy aldehyde or $\beta$-hydroxy ketone.
Caution Those aldehydes which does not have $\alpha$-hydrogen atom like $\mathrm{HCHO}$, does not give aldol condensation reaction.