What happens when fehlings solution is mixed with glucose?

When Fehling's solution is mixed with glucose, a reducing sugar, a redox reaction occurs. The copper(II) ions in Fehling's solution are reduced to copper(I) oxide, resulting in the formation of a red precipitate. This change indicates the presence of reducing sugars, as glucose donates electrons during the reaction. The appearance of the red precipitate confirms the positive result for reducing sugars in the solution.