Question

Riya performed an activity with unchewed rice (case1) and chewed rice (case2) by adding iodine. What difference will she notice in colour change for both the cases?

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.

Answer 2

Answer:

In Case-A, the chewed 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 Case-A.

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