2.1 Lalitha tested boiled rice and egg white for the presence of carbohydrates. (b) Mention the steps she must have followed to perform this activity.
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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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sorry i d
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