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  4. Which of the following pairs give positive Tollen’s test?

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Q. Which of the following pairs give positive Tollen’s test?

VITEEEVITEEE 2014Aldehydes Ketones and Carboxylic Acids

Solution:

Aldehydes and $\alpha$-hydroxy ketones give positive Tollen's test. Glucose is a polyhydroxy aldehyde and fructose is an $\alpha$-hydroxy ketone.