In an activity two test tubes were taken named A and B. In test tube A boiled rice was taken and in test tube B boiled and chewed rice was taken. Iodine solution was added in both test tubes A and B. choose the correct observation from the options below *
a) The rice in test tube A will turn blue black while rice in test tube B will not show any change
b) The rice in test tube A will not show any change while rice in test tube B will turn blue black
c) Rice in both test tubes will turn blue black
d) rice in both test tubes will not show any change
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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.
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