Biomolecules — Medium JEE chemistry MCQ
**[JEE Mains 2026]** Statement-I: Sucrose is dextrorotatory, but upon hydrolysis it becomes laevorotatory.
Statement-II: Sucrose on hydrolysis gives glucose and fructose such that the laevorotation of fructose is more than the dextrorotation of glucose.
Which of the following is correct?
- A. Both Statement-I and Statement-II are true, and Statement-II is the correct explanation
- B. Both Statement-I and Statement-II are true, but Statement-II is not the correct explanation
- C. Statement-I is true but Statement-II is false
- D. Statement-I is false but Statement-II is true
Solution
Sucrose ([α] = +66.5°) on hydrolysis gives glucose ([α] = +52.7°) and fructose ([α] = -92.4°).
Net rotation = +52.7 - 92.4 = -39.7° (laevorotatory).
This is called inversion of sucrose. Statement-II correctly explains Statement-I.