Glucose gives a brick-red precipitate with Fehling's solution because it is

Glucose gives a brick-red precipitate with Fehling's solution because it is

Answer Details

Glucose gives a brick-red precipitate with Fehling's solution because it is a reducing sugar. Fehling's solution contains copper ions (Cu²⁺) which are reduced to copper (I) oxide (Cu₂O) by reducing sugars. The brick-red precipitate is the copper (I) oxide formed in the reaction. Glucose is a reducing sugar because it has a free aldehyde or ketone functional group that can donate electrons and reduce other substances like the copper ions in Fehling's solution.