Which of the following statements is correct about sucrose?
A. It belongs to the class of polysaccharides.
B. It belongs to class of disaccharides.
C. It is a reducing sugar.
D. It is a non-reducing sugar.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → B and D only
Sucrose is a disaccharide of glucose and fructose, and since both reducing groups are used in the glycosidic bond it is a non-reducing sugar.
A. It belongs to the class of polysaccharides. — Incorrect. It gives only two monosaccharide units on hydrolysis.
B. It belongs to class of disaccharides. — Correct. One glucose and one fructose unit.
C. It is a reducing sugar. — Incorrect. It has no free carbonyl group, so it does not reduce Tollens’ or Fehling’s reagent.
D. It is a non-reducing sugar. — Correct. The reducing groups of glucose (C1) and fructose (C2) are used in the glycosidic bond, so no free aldehyde or keto group is left.
NCERT (2026-27 edition):
Disaccharides – …
