Question

1. When a drop of iodine solution was put on the cut surface of a potato, it turned blue-black in colour. This indicates the presence of-​

Answer 1

Hi mate

starch

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.

Answer 2

Answer:

It shows the presence of starch✌✌