Question

a food sample is tested with a chemical and it turn blue black colour a) definitely the nutrients present in the food sample b) name the chemical used from the test​

Answer 1

Answer:

Iodine test is used to determine the presence of starch in food items. If iodine is added to any food item and it causes the food item to turn to a blue-black colour. This indicates the presence of the nutrient called starch (carbohydrate).