Sucrose undergoes hydrolysis to yield an equimolar mixture of D-(+)-glucose and D-(-) fructose. The glycosidic linkage is between C₁ of a-D-glucose and C₂ of b-D-fructose, involving the reducing groups and making sucrose a non-reducing sugar.

In disaccharides, reducing sugars have free aldehydic or ketonic groups, such as maltose and lactose. Non-reducing sugars, like sucrose, involve these functional groups in glycosidic bond formation.

Glycosidic linkage in disaccharides is formed by the loss of a water molecule, connecting two monosaccharide units through an oxygen atom. It results from the bonding of the reducing groups (aldehydic or ketonic) of monosaccharides.

Fructose belongs to the D-series and is a laevorotatory compound. Its open-chain structure includes a ketonic functional group at carbon number 2.

Fructose has the molecular formula C₆H₁₂O₆ and contains a ketonic functional group at carbon number 2. It shares similarities with glucose in having six carbons in a straight chain.