Question:
An example of non-reducing sugar is
An example of non-reducing sugar is
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A reducing sugar has a free aldehyde or ketone group (a free anomeric carbon) that can reduce Tollen's or Fehling's reagent.
Updated On: Jun 16, 2026
- Glucose
- Sucrose
- Lactose
- Maltose
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The Correct Option is B
Solution and Explanation
Concept: A reducing sugar has a free aldehyde or ketone group (a free anomeric carbon) that can reduce Tollen's or Fehling's reagent. In sucrose, the anomeric carbons of both glucose and fructose are locked in the glycosidic linkage, so there is no free reducing group, making it a non-reducing sugar. Glucose, lactose and maltose each still have a free anomeric carbon and are therefore reducing sugars.
Answer: Option (B) - because in sucrose both anomeric carbons are involved in the glycosidic bond, leaving no free reducing group.
Answer: Option (B) - because in sucrose both anomeric carbons are involved in the glycosidic bond, leaving no free reducing group.
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