A potato tuber has been cut into two halves few drops of iodine solution are placed on the surface one What colour change will be noticed?
The potato tuber will turn a dark blue-black colour when iodine solution is placed on its surface. This is because the potato contains starch, which reacts with iodine to form a complex that is dark blue-black in colour. This reaction is used as a test for the presence of starch in foods.
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