BI-149
Food tests
Biology · Secondary 3 · Easy · Food tests
A teacher wants to test a food sample for the presence of starch. Which procedure should be used?
- Add Biuret solution and look for a violet colour.
- Add Benedict’s solution and heat to look for a brick‑red precipitate.
- Add iodine solution and look for a blue‑black colour.
- Add ethanol and water and look for a cloudy emulsion.
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