Chemistry - Biomolecules Question with Solution | TestHub

Explanation Question:

The question asks to which sugar does not reduce Benedict's solution.

Concept:

This question is based on reducing & non reducing sugars.

Solution:

Benedict's solution is reduced only by sugars that contain a free aldehyde or keto group (reducing sugars). Lactose, maltose and fructose are reducing sugars. Sucrose is a non reducing sugar because its anomeric carbons are involved in glycosidic linkage, so no free hemiacetal/hemiketal group is present to reduce Benedict's regent.