When Riya was doing an experiment, she found that a food item turned blueblack when iodine was added. What do you think this food contains?

Protein

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Fat

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Carbohydrate

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Minerals

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Solution

The correct option is C Carbohydrate
Iodine test is performed to check the presence of starch in a food item. When iodine solution is added to a food, if it turns blue black, it indicates the presence of starch. In the absence of starch, the food will exhibit the brown or yellow colour of the iodine solution only.

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Write down food items which will turn blue black when iodine solution is added.

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