Question

Which one is a non reducing commercial sugar?
A) Sucrose
B) Fructose
C) Lactose
D) Glucose

Answer 1

Hint: Any carbohydrate that can cause the reduction of some other substances without being hydrolyzed to reduce sugar, while sugars that do not have a free ketone or a group of aldehydes are called the sugar that has not been found. It is worth remembering here that unfinished sugars are never oxidized.

Complete answer:
Sucrose is commercial sugar or table sugar, which is also called cane sugar because most of it is obtained from sugar cane (Saccharum officinarum). Unlike its components (glucose and fructose), sucrose, a disaccharide is a sugar that is not found. The grapes contain glucose sugars and glucose (monosaccharides), germination of barley grains contains maltose sugar (disaccharides) and mother milk contains lactose sugar (disaccharides), all reducing sugars.
Hence, the correct option is A) sucrose.

Note:
The non-reducing sugar form is in the acetal or the ketal form whereas the reducing forms are in the hemiketal or the hemiacetal. The reducing sugars possess mutarotation while on the other hand, the non-reducing sugars never exhibit such rotational behaviors. The reducing sugar forms osazones while the other form of sugar doesn’t form osazones. The reducing sugars are mainly monosaccharides where all polysaccharides are non-reducing sugars.