In Benedict's test, brick red indicates what level of sugar concentration?

• A. No sugar
• B. Low concentration
• C. High concentration
• D. Medium concentration

Answer: (C)

The brick red color shows a high concentration of reducing sugar. In Benedict’s test, blue copper(II) ions are reduced by reducing sugars when heated. The more sugar present, the more copper(II) is reduced to copper(I) oxide, which appears as a brick-red precipitate. As sugar concentration increases, the color shifts from blue to green, yellow, orange, and finally brick red, indicating progressively higher amounts of reducing sugar.