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CBSE - XII Science - Chemistry - Biomolecules

ketones donot respond to fehling test, but why does fructose, inspite of being a ketose respond to the reaction?

Asked by SHUBHAM DIXIT 22nd December 2011, 12:00 AM
Answered by Expert


D-Fructose rearranges to D-glucose in alkaline medium .this rearrangement is known as Lobry de Bruyn-Van Ekenstein rearrangement.

It is probably due to this isomerisation that fructose reduces fehling's solution in alkaline medium although it does not contain a -CHO group.
Answered by Expert 23rd December 2011, 10:08 AM

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