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Question

Fructose and glucose can be distinguished by:

A
Seliwanoff’s reagent
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B
Benedict’s reagent
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C
Fehling’s reagent
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D
Barfoed’s reagent
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Solution

The correct option is A Seliwanoff’s reagent
Seliwanoff’s reagent is used in a test which helps to distinguish between an aldose and a ketose sugar. Fructose is a ketose sugar, whereas glucose is a aldose sugar.

Benedict’s reagent and Fehling's reagent are used to detect the presence of reducing sugars.
Barfoed's reagent is used for detecting the presence of monosaccharides.

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