Question

How do you test for the presence of starch in a food item? [5 MARKS]

Answer 1

1 Mark each


The following steps are performed to test the presence of starch in a food item.

1. A small quantity of the food item to be tested is taken.
2. The food sample is then diluted with two drops of water.
3. 2-3 drops of iodine solution are added to it.
4. Once the iodine solution is added, the colour change in the food sample is observed.
5. Change of colour in the food sample into blue-black indicates the presence of starch in it.