Question

Paheli and Boojho took few seeds of moong dal and wanted to sprout them. Boojho took boiled seeds and Paheli took dry seeds. After two days Paheli was successful in sprouting them and Boojho was unsuccessful. Explain both the situations giving reasons.


class 6

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.