JEE Main 20264 AprilMorning Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 4 April
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Biomolecules
JEE Main 2026 · 4 April · Morning Shift · Chemistry · Biomolecules
Given below are two statements: Statement I: The structure of...
Given below are two statements:
Statement I: The structure of Maltose is given below:
Maltose is a non-reducing sugar.
Statement II: The structure of Lactose is given below:
Lactose is a reducing sugar.
In the light of the above statements, choose the correct answer from the options given below
Statement I: The structure of Maltose is given below:
Maltose is a non-reducing sugar.
Statement II: The structure of Lactose is given below:
Lactose is a reducing sugar.
In the light of the above statements, choose the correct answer from the options given below
Options
- ABoth Statement I and Statement II are true
- BBoth Statement I and Statement II are false
- CStatement I is true but Statement II is false
- DStatement I is false but Statement II is true
Correct answer
D. Statement I is false but Statement II is true
Step-by-step solution
Maltose is a disaccharide composed of two -D-glucose units linked by an glycosidic bond. The anomeric carbon (C1) of the second glucose unit has a free hemiacetal group, which can open to form an aldehyde. Therefore, maltose can reduce Tollens' and Fehling's reagents, making it a reducing sugar. Statement I claims that maltose is a non-reducing sugar, so it is false.
Lactose is a disaccharide composed of -D-galactose and D-glucose linked by a glycosidic bond. Similar to maltose, the anomeric carbon (C1) of the glucose unit in lactose has a free hemiacetal group. This allows it to act as a reducing agent. Statement II correctly identifies lactose as a reducing sugar, so it is true.
Therefore, Statement I is false but Statement II is true.
Answer: Statement I is false but Statement II is true
Lactose is a disaccharide composed of -D-galactose and D-glucose linked by a glycosidic bond. Similar to maltose, the anomeric carbon (C1) of the glucose unit in lactose has a free hemiacetal group. This allows it to act as a reducing agent. Statement II correctly identifies lactose as a reducing sugar, so it is true.
Therefore, Statement I is false but Statement II is true.
Answer: Statement I is false but Statement II is true