Question

when a drop of iodine solution put on the cut surface of a Potato it turns blue black in colour. This indicate the presence of what ?​

Answer 1

Answer:

Iodine test is performed to test the presence of starch. It turns into blue if starch is present

Answer 2

Answer:

Starch

Explanation:

When will drop iodine solution on potato the area which comes under contact of iodine solution will turn blue-black due to presence of starch. This practice is known as starch test: Starch Test: Add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour.

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