Condensation reaction

A condensation reaction is a reaction in which a water molecule is formed, usually in bond making, for example, carbohydrates in making glycosidic bonds.

The production of maltose from two glucose molecules is an example of a condensation reaction-

C₆H₁₂O₆ + C₆H₁₂O₆ --> C₁₂H₂₂O₁₁ + H₂O