Sucrose is not a reducing sugar since

Options

A. it is chemically stable
B. it contains no free aldehyde or keto group adjacent to a group
C. it is built up of a fructose unit
D. it is optically active

Answer

B

Explanation

All those carbohydrates which contain aldehydic or ketonic group in the hemiketal form and reduce Tollen's or Fehling's reagent are called reducing sugars . Disaccharides like sucrose in which the two monosaccharide units are linked through their reducing centres , i.e., aldehydic or ketonic groups are non - reducing .