HUMAN NUTRITION

Detailed explanation-1: -We can use a special reagent called Benedict’s solution to test for simple carbohydrates like glucose. Benedict’s solution is blue but, if simple carbohydrates are present, it will change colour – green/yellow if the amount is low and red if it is high.

Detailed explanation-2: -Result Interpretation of Benedict’s Test If color changes to red, then 1.5 to 2.0 percent sugar is present. And if color changes to brick red, it means that more than 2 percent sugar is present in solution.

Detailed explanation-3: -Fehling’s and Benedict’s solution contains cupric ions or Cu2+ ions. The Cu2+ ions are reduced to Cu+ ions by addition of electrons in the presence of reducing sugars such as glucose and maltose. The Cu+ ions in the reagent then forms Cu2O or Cu(I)oxide, which is brick red in colour.