NURSING EXAM QUESTIONS
NUTRITION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Million’s reagent
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Fehling’s solution
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Sudan III
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Iodine solution
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Detailed explanation-1: -A chemical test for starch is to add iodine solution (red) and see if it turns blue/black in colour. It is possible to distinguish starch from other carbohydrates using this iodine solution test. For example, if iodine is added to an peeled potato then it will turn black. Was this answer helpful?
Detailed explanation-2: -Iodine is used to test the presence of starch and this test is known as Starch-Iodine test. In this test, the presence of starch is detected by observing a change in color that is due to the formation of a complex. The reagents in this test are – a solution of I2 (iodine) and KI (potassium iodide).
Detailed explanation-3: -Iodine solution is used to test the presence of starch.
Detailed explanation-4: -I + KI = IKI solution Molecular iodine or iodine molecule, i.e., I2 molecule, is insoluble in water. Therefore, potassium iodide is used for making the laboratory reagent.