Question

All of the following Sugars are reducing suagrs except
Sucrose
Glucose
Lactose
Galactose​

Answer 1

Explanation:

Sugar is a substance which is crystalline, sweet in taste and soluble in water. A compound which acts as a reducing agent because of the presence of either ketoses or aldoses group forms a reducing sugar. All monosaccharides (cannot be hydrolyzed further) come under reducing sugar.  Disaccharides which have aldehydic and ketonic group free, act as reducing sugars eg: maltose and lactose. 

Galactose( C6H12O6) is a monosaccharide. It is as sweet as glucose. As shown in the above fig, the structure of galactose is same as that of glucose, but it differs in the arrangements of atoms. Since it is a monosaccharide, it is a reducing sugar.