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Question
Refer the given experiment. What can you conclude from it?
Refer the given experiment. What can you conclude from it?
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Solution
The correct option is A Saliva converts starch to sugars, which do not give blue-black colour with iodine.
The process of digestion begins in the mouth. Saliva secreted by the salivary glands can convert starch into sugars. When some boiled rice is taken in a test tube and a few drops of iodine solution are poured into it, we see violet colour. But when we add some boiled rice with saliva it will not give violet colour because saliva contains amylase which converts the starch into the simple sugar. Thus, on the addition of iodine solution, it does not give violet but reddish-brown colour.
The process of digestion begins in the mouth. Saliva secreted by the salivary glands can convert starch into sugars. When some boiled rice is taken in a test tube and a few drops of iodine solution are poured into it, we see violet colour. But when we add some boiled rice with saliva it will not give violet colour because saliva contains amylase which converts the starch into the simple sugar. Thus, on the addition of iodine solution, it does not give violet but reddish-brown colour.
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We have two test tubes here, X and Y. X contains boiled rice and Y contains boiled rice that has been completely chewed on. Which one is more likely to turn blue-black on adding an iodine solution?
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