Differences between reducing and non-reducing sugars are:
1. Possess a free aldehyde(-CHO) or ketone (-C=0) Group.
2. Can reduce the Cu2+ cupric ions (blue)in Fehling’s or Benedict’s Solution to Cu+ cuprous ions (reddish) that precipitate out as Cu2O(cuprous oxide).
3. Maltose. lactose, melibiose, gentiobiose, cellobiose, mannotriose, rhamnotriose.
1. A free aldehyde or ketonic group is lacking.
2. No such reaction.
3. Sucrose, trehalose,raffinose, gentiarose, melezitose.