Which of the following pairs give positive Tollens test?

Glucose, sucrose

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Glucose, fructose

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Hexanal, Acetophenone

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Fructose, sucrose

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Solution

The correct option is B Glucose, fructose
Aldehydes and - hydroxy ketones give positive Tollens test. Glucose has an aldehydic group and fructose is a hydroxy ketone

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