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Types of Nutrients in Food and Their Sources

Rice is a ric...

Question

Rice is a rich source of starch and iodine gives blue black colour with starch. If you add iodine solution to chewed rice what colour will it give?

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Solution

the saliva present in mouth has acted upon starch to break down into sugars. So it does not show any colour in presence of iodine solution.

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On treatment with iodine, the presence of starch gives blue-black colour because

Q. Which of the following statement(s) is/are correct?

Statement 1: When iodine solution is added to chewed boiled rice, the colour of the solution changes to pink.

Statement 2: The starch gets digested by saliva present in the chewed rice.

Study the given statements and select the correct answer.
(i)Cellulose is a homopolymer of glucose.
(ii)Inulin is a homopolymer of fructose.
(iii)Starch gives blue colour and glycogen gives red colour with iodine solution.

(iv)Cellulose gives no colour with iodine solution.

Q. When starch is treated with iodine solution, its colour changes to

Q. Foods rich in starch turnsin colour, when treated with iodine solution.

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Types of Nutrients in Food and Their Sources

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