Maltose is a disacharide that is formed by joining two glucose molecules together via alpha 1, 4 glycosidic bond.
The chemcal equation for the reaction is given below:
2C6H12O6 = C12H24O12 + H2O.
This type of reaction is called CONDENSATION REACTION.
A condensation reaction is a type of chemical reaction in which two molecules are combined together to form a larger molecule and other small by product such as water.