Question

based on your stuff in the test for starch carbohydrates which food sample tested and positive​

Answer 1

Answer:

Iodine test for starch

Starch is detected using iodine solution . This turns blue-black in the presence of starch. Testing rice for the presence of starch.

Answer 2

Answer:

Out of many tests, starch test is one of the tests conducted on food substances in order to determine the presence of carbohydrates in them.

Explanation:

• Iodine test is done to determine the presence of starch in a given food sample.
• It is specific for polysaccharides.
• Carbohydrate – glucose is a helical molecule and iodine can be absorbed in between the molecules. This absorptive property forms the basic principle of iodine starch test.
• In this test, the food sample is taken in a solution form in a test tube and dilute 2-3 drops of iodine solution is poured into it.
• If the colour of the test tube changes to blue-black, then starch presence is confirmed.
• Starch is present in substances like – potatoes, bread, rice, pasta, cereals etc.  

Hence, we can say that potatoes, bread etc. have starch in them and they tested positive for iodine test conducted.

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