Question

which of the following food items shows a positive positive starch test from Oil butter rice egg​

Answer 1

Explanation:

Test to confirm the presence of carbohydrate (starch)

Put 2-3 drops of iodine solution on it. Observe the colour of the food item. Change of colour in the food item into blue-black indicates the presence of starch in the food item.

Answer 2

Out of the following rice shows a positive starch test.

Explanation:

• Starch is a complex form of polysaccharide. It is stored in rice. The starch can be tested by using two to three drops of iodine.

• When the iodine sample is poured into the substance containing starts there is a change of the colour from brown to blue black due to the presence of a complex which is formed by starch and iodine.

• All the other are rich in fat and protein except rice which is rich in carbohydrate

to know more about starch test,

take 1 ml of starch solution in two test tubes A and B. Add 1ml saliva ...

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