Question

the image shows and experiment set up in which boiled rice was taken in test of a and void and cubed rice was taken in test tube baby when I don't solution is dropped into both the lightest tops the colour of water in test a change to blue black but the colour printed top we remained unchanged give reason​

Answer 1

Answer:

In test-tube A, the boiled rice contains starch. When we add 1-2 drops of iodine, the combination turns in the shade of blue-black. This indicates the presence of starch in the test tube A.

In test-tube B, the starch of rice converts into sugar on digestion. Thus, the colour of iodine will not change.