Which of the following is used to detect the presence of starch in food items?
A
Dilute iodine solution
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B
Copper sulphate solution
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C
Baking powder
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D
Lime water
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Solution
The correct option is A Dilute iodine solution Food items like rice, potato, bread, etc., are rich in starch. After adding a few drops of dilute iodine solution to the sample of these food items, it develops a deep blue or blue-black colour. This confirms the presence of starch in the sample.