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A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?
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- From brown to blue-black
- From brown to orange-red
- From blue to pink
- From pink to blue-green
- From brown to blue-black
Correct Option: A
The Iodine test is used to test for the presence of starch. Iodine solution — iodine dissolved in an aqueous solution of potassium iodide — reacts with the starch producing a purple black colour.
