BI-103
Food tests
Biology · Secondary 3 · Easy · Food tests
A student wants to test whether a colourless solution contains glucose. Which procedure should she use?
- Add iodine solution; a blue‑black colour shows glucose is present.
- Add Biuret solution; a purple colour shows glucose is present.
- Add Benedict’s solution and heat; a brick‑red precipitate shows glucose is present.
- Add ethanol and water; a cloudy white layer shows glucose is present.
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