Foods rich in starch turnsin colour, when treated with iodine solution.
A
orange
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B
pink
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C
green
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D
blue-black
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Solution
The correct option is D blue-black Starch is a type of carbohydrate. The presence of carbohydrates in food can be tested by adding few drops of dilute iodine solution. The formation of blue-black colour confirms the presence of carbohydrates in the food item. Carbohydrate-rich foods include potato, rice, bread and fruits like banana, grapes, etc.