Question:
Which of the following is non-reducing sugar?
Which of the following is non-reducing sugar?
Show Hint
A sugar is non-reducing when both anomeric carbons are tied up in the glycosidic bond.
Updated On: Nov 12, 2026
- Lactose
- Fructose
- Sucrose
- Maltose
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Reducing sugars have a free hemiacetal or hemiketal group that reduces Tollens' and Fehling's reagents.
Step 2: Sucrose
In sucrose, C-1 of glucose and C-2 of fructose join in the glycosidic link, so no free reducing group remains.
Step 3: Others
Lactose, maltose and fructose all have a free reducing group.
Final Answer:
Sucrose is the non-reducing sugar. \[ \boxed{\text{(C) }\text{Sucrose}} \]
Reducing sugars have a free hemiacetal or hemiketal group that reduces Tollens' and Fehling's reagents.
Step 2: Sucrose
In sucrose, C-1 of glucose and C-2 of fructose join in the glycosidic link, so no free reducing group remains.
Step 3: Others
Lactose, maltose and fructose all have a free reducing group.
Final Answer:
Sucrose is the non-reducing sugar. \[ \boxed{\text{(C) }\text{Sucrose}} \]
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