Question:
Which of the following is a non-reducing sugar?
Which of the following is a non-reducing sugar?
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Non-reducing sugars lack a free aldehyde or ketone group due to glycosidic linkage, making sucrose non-reducing.
Updated On: Jun 2, 2025
- Glucose
- Fructose
- Maltose
- Sucrose
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The Correct Option is D
Solution and Explanation
A non-reducing sugar is one that does not have a free aldehyde or ketone group capable of acting as a reducing agent.
- Glucose, fructose, and maltose all have free reducing ends that can reduce Tollens' or Benedict's reagent.
- Sucrose, however, is a non-reducing sugar because its glycosidic bond involves the aldehyde group of glucose and the ketone group of fructose, leaving no free reducing group.
Hence, sucrose is a non-reducing sugar.
- Glucose, fructose, and maltose all have free reducing ends that can reduce Tollens' or Benedict's reagent.
- Sucrose, however, is a non-reducing sugar because its glycosidic bond involves the aldehyde group of glucose and the ketone group of fructose, leaving no free reducing group.
Hence, sucrose is a non-reducing sugar.
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