Question:easy
Reducing sugar in urine can be detected by?
Reducing sugar in urine can be detected by?
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Benedict, Fehling and glucose-oxidase can all pick up sugar in urine.
Updated On: Jun 24, 2026
- Benedict's test
- Fehling's solution
- Glucose-oxidase test
- All of the above
Show Solution
The Correct Option is D
Solution and Explanation
Step 1: The question lists three classic urine sugar tests and asks which can flag a reducing sugar. Reducing sugars donate electrons because of an exposed carbonyl group.
Step 2: Benedict's reagent is the standard screening tool; the sugar reduces copper and the tube turns green to brick red depending on how much sugar is present.
Step 3: Fehling's solution is an older copper based reagent that exploits the very same reduction chemistry, so it too signals a reducing sugar.
Step 4: The glucose-oxidase strip is enzyme based and specific for glucose. Because glucose itself is a reducing sugar, a positive strip also confirms reducing sugar in the urine. Every option is therefore valid.
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Step 2: Benedict's reagent is the standard screening tool; the sugar reduces copper and the tube turns green to brick red depending on how much sugar is present.
Step 3: Fehling's solution is an older copper based reagent that exploits the very same reduction chemistry, so it too signals a reducing sugar.
Step 4: The glucose-oxidase strip is enzyme based and specific for glucose. Because glucose itself is a reducing sugar, a positive strip also confirms reducing sugar in the urine. Every option is therefore valid.
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