Question

if we can drop some iodine in a potato.What will happen?

Answer 1

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.

Answer 2

If we put a drop of iodine on a cut potato, we can see that that the colour changes to blue-black.

This indicates the presence of starch.

See in the pic. There's the colour. we can say that it contains starch.

:)