Study the given diagram carefully. Which option correctly explains the reason for the appearance of the blue black colour?
[Diagram: Iodine added to potato juice; potato juice turning blue black]

Question

Study the given diagram carefully. Which option correctly explains the reason for the appearance of the blue black colour?
[Diagram: Iodine added to potato juice; potato juice turning blue black] — Exam MCQ

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B. Potato juice contains starch, which turns blue black with iodine — The blue-black color appears when iodine reacts with starch present in potato juice. This reaction is a common test for detecting the presence of starch. Starch, a complex carbohydrate, forms a blue-black complex with iodine, confirming its presence in substances like potato juice. This test is widely used in laboratories to identify starch in various materials.

rrbjepyq.in · Answer

A. Potato juice contains proteins, which turn blue black with iodine

rrbjepyq.in · Answer

C. Potato juice contains glucose, which turns blue black with iodine

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D. Potato juice contains fats, which turn blue black with iodine

Study the given diagram carefully. Which option correctly explains the reason for the appearance of the blue black colour? [Diagram: Iodine added to potato juice; potato juice turning blue black]

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