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A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains
(a) complex proteins
(b) simple proteins
(c) fats
(d) starch
Answers (1)
Explanation: Starch solution on addition of iodine turns blue-black in colour and this test is used as a confirmation test for iodine.
The iodine–starch test is a chemical reaction that is used to test for the presence of starch or iodine. The combination of starch and iodine is intensely blue-black. Hence, (d) is the correct option.
View full answer
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