Question

(a) Analyse which of the three test tubes will turn iodine solution blue black? (1) Test tube A Test tube C (ul) Test tube B (iv) none of these (b) Which of the above foodstuff when taken in excess​

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.

Pepy!