BI-1384
Food tests
Biology · Secondary 4 · Medium · Food tests
A student adds Benedict’s solution to 2 cm³ of glucose solution and heats the mixture in a hot water bath for 3 minutes.
Which observation shows a positive result for reducing sugar?
Which observation shows a positive result for reducing sugar?
- A brick-red precipitate forms from the blue solution.
- The blue solution turns purple without a precipitate.
- The solution remains blue with no visible change.
- A blue-black colour appears immediately without heating.
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