Question

Adding iodine solution on a cut potato turns it dark blue in color. Why is this so?

• A. Iodine reacts with the water in the potato, giving it a blue – black color
• B. Iodine already has a blue-black color, so adding it to the potato only stains it.
• C. Iodine breaks down fats into sugars, which gives the blue black color
• D. None of the above

Answer 1

The correct option is D

None of the above

Potato is a rich source of starch. Iodine solution (brown color) reacts with the starch which produces theDark blue or purple color. Simple sugars are colorless when iodine solution is added.