BI-1335
Food tests
Biology · Secondary 4 · Medium · Food tests
A student tests a food sample for starch using iodine solution. She adds a few drops of iodine solution to the food sample.
Which observation shows that starch is present in the food sample?
Which observation shows that starch is present in the food sample?
- Iodine solution remains yellow-brown after adding it.
- Solution turns brick-red after heating with Benedict’s solution.
- Iodine solution changes from yellow-brown to blue-black.
- A cloudy white emulsion appears after adding ethanol and water.
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