Question

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Answer 1

Answer:

The iodine-starch test is a chemical reaction that used to test for the presence of starch or for iodine. The combination of starch and iodine is intensely "blue-black". The interaction between starch and triiodide is the basis for iodometry.

Explanation:

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Answer 2

Answer:

Iodine solution is used to check the presence of the carbohydrate in any given solution ....

IN most cases it is used to check the presence of starch which is a polysaccharide  ( carbohydrate)

working :-

When there is a presence of starch in any solution, then the colour of the solution turns bluish black after the addition of the iodine solution .

Example:-

The the best example of it is that it used in the urine test whether glucose(carbohydrate ) {starch is an polymer of glucose} is present or not in urine of the person and thus we come to known whether a person is suffering from Glycosuria .......

I hope it helps you....