Boojho took some grains of boiled rice in test tube ‘A’ and Paheli took boiled and chewed rice in test tube

Monjur Alahi

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.


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Salim Ahmed Kawsar

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In test tube ‘A’ – blue black colour because of presence of starch. In test tube ‘B’ – colour of iodine will not change because of digestion of starch into sugars.

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