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Condensation between two molecules of an aldehyde or a ketone having atleast one \(\alpha\) -hydrogen atom in presence of a base to form a \(\beta\) -hydroxy aldehyde or \(\beta\) -hydroxy ketone is known as aldol condensation. Aldol condensation are divided into two parts one is self aldol condensation and another is cross-aldol condensation, when both molecules are same called self aldol and vice versa.