Condensation reaction
Water molecule is released, covalent bond is formed and larger molecule is formed from smaller ones
Hydrolysis reaction
Water molecule chemically added, covalent bond breaks and smaller molecule are formed from larger ones
General formulae of disaccharides
C12 H22 O11
Sucrose
a-glucose and fructose
Lactose
a-glucose and B-galactose
Maltose
a-glucose and a-glucose