Why does fructose reduce Fehling's solution?

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The discussion focuses on the use of Tollen's and Fehling's solutions as confirmatory tests in organic analysis, particularly regarding fructose. It highlights that fructose in aqueous solution exists in a dynamic equilibrium with its other forms, which contribute to the reduction reactions observed in these tests. The conversation suggests that the presence of certain functional groups in fructose is responsible for its reactivity with Tollen's and Fehling's reagents, emphasizing the importance of understanding these chemical behaviors in organic chemistry.
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is it because of the keto group it has? what generally reduces fehlings solution and tollens reagent??
 
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You must know which group in organic analysis uses Tollen's and Fehling's solution as confirmatory test.

Actually, fructose in aqueous solution is not just fructose. It changes its form, being under kinetic equilibrium with its other forms (try to guess), which in turn are responsible for those confirmatory tests.
 

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