9. Rohit added a few drops of a liquid to a test tube containing mashed potato. On adding that liquid, the mashed potato turned blue-black in color.

What could be the liquid added, and what do you infer from it?



Answer :

Final answer:

The iodine solution caused the mashed potato to turn blue-black, indicating the presence of starch.


Explanation:

The liquid added could be iodine solution. When iodine reacts with a substance containing starch, it produces a blue-black color. This color change indicates the presence of starch in the mashed potato.


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