Question:
Which of the following is non reducing sugar?
Which of the following is non reducing sugar?
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A non-reducing sugar has no free anomeric carbon.
Updated On: Nov 12, 2026
- Fructose
- Maltose
- Sucrose
- Lactose
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
A reducing sugar has a free hemiacetal or hemiketal carbon that opens to a free carbonyl group and reduces Tollens' or Fehling's reagent.
Step 2: Check the sugars
Fructose is a monosaccharide, and maltose and lactose keep one anomeric carbon free. All three are reducing.
Step 3: Sucrose
In sucrose, C-1 of glucose is joined to C-2 of fructose, so both anomeric carbons are used in the glycosidic link. It is non-reducing.
Final Answer:
Sucrose is the non-reducing sugar. \[ \boxed{\text{(C) }\text{Sucrose}} \]
A reducing sugar has a free hemiacetal or hemiketal carbon that opens to a free carbonyl group and reduces Tollens' or Fehling's reagent.
Step 2: Check the sugars
Fructose is a monosaccharide, and maltose and lactose keep one anomeric carbon free. All three are reducing.
Step 3: Sucrose
In sucrose, C-1 of glucose is joined to C-2 of fructose, so both anomeric carbons are used in the glycosidic link. It is non-reducing.
Final Answer:
Sucrose is the non-reducing sugar. \[ \boxed{\text{(C) }\text{Sucrose}} \]
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