if adyasha took chewed rice in a test tube and tapasya took raw rice in a test tube.both of them pour 2-3 drops of dilute iodine solution.whose test tube will show blue black colour? give reason.
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When iodine solution were added to rice water, the solution turned blue black because of the presence of starch. When iodine comes in contact with starch, it forms starch Iodide complex because iodine gets stuck in the beta coils in the structure of amylose of starch. The starch iodide complex gives blue-black colour ):
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