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Question
On a sample of rice, iodine test was performed in two ways and the result was recorded as given below.
PROCEDUREResult1.Rice + lodineBlue black colour2.Rice + Saliva (3-4 minutes) + lodineBlue black colour
Select the incorrect option from the following:
On a sample of rice, iodine test was performed in two ways and the result was recorded as given below.
PROCEDUREResult1.Rice + lodineBlue black colour2.Rice + Saliva (3-4 minutes) + lodineBlue black colour
Select the incorrect option from the following:
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Solution
The correct option is B Result 2 is correct
Rice is a rich source of starch so if iodine solution is added to rice, it will give blue black color, but if the rice is chewed (addition of saliva) for 3-4 minutes it will not give any color with iodine because saliva breaks starch present in rice into sugars.
Result 2 is correct
Rice is a rich source of starch so if iodine solution is added to rice, it will give blue black color, but if the rice is chewed (addition of saliva) for 3-4 minutes it will not give any color with iodine because saliva breaks starch present in rice into sugars.
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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?
