BI-137
Food tests
Biology · Secondary 3 · Easy · Food tests
A student wants to test a solution for the presence of fat. Which procedure should she follow to obtain a positive result if fat is present?
- Shake the sample with ethanol, then add water and look for a cloudy white layer.
- Boil the sample with Benedict’s solution and look for a brick-red precipitate.
- Add iodine solution and look for a blue-black colour.
- Add Biuret solution and look for a violet colour.
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