BI-116
Food tests
Biology · Secondary 3 · Easy · Food tests
A student adds 2 cm³ of glucose solution to 2 cm³ of Benedict’s solution in a test tube and heats the mixture in a boiling water bath for 3 minutes. Which observation shows that reducing sugar is present?
- Solution remains blue and clear
- Solution turns green but no precipitate forms
- A brick‑red precipitate forms
- Solution turns purple
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