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प्रश्न
Boojho took some grains of boiled rice in test tube ‘A’ and Paheli took boiled and chewed rice in test tube ‘B’. Both of them poured 1-2 drops of iodine solution into the test tube and observed the colour change. What colour change would they have observed? Give reasons for your answer.
उत्तर
After pouring iodine solution into test tube ‘A’, its colour will change to blue-black due to the presence of starch in boiled rice. In test-tube B, the colour of iodine will not change because of the digestion of starch into sugars by the action of the salivary amylase enzyme during chewing.
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