Disaccharides are carbohydrates that consist of two molecules of the same or different monosaccharides. During hydrolysis, a disaccharide yields two moles of monosaccharides. The mode of linkage between these monosaccharides is the glycosidic linkage. The general molecular formula is C_nH_2nO_n−1.

Examples

Maltose  Glucose glucose + (reducing sugar)
Lactose  Galactose + glucose (reducing sugar)
Sucrose  Glucose + fructose (non reducing sugar)