Question

an example of non reducing sugar?

Answer 1

Sucrose is the most common nonreducing sugar. The linkage between the glucose and fructose units in sucrose, which involves aldehyde and ketone groups, is responsible for the inability of sucrose to act as a reducing sugar.

Answer 2

All monosaccharides are reducing sugars because all monosaccharides have an aldehyde group (if they are aldoses) or can tautomerize in solution to form an aldehyde
group (if they are ketoses). This includes common monosaccharides like galactose,glucose, glyceraldehyde, fructose, ribose, and xylose.