Question

The reaction of the starch in the potato with the iodine solution gives

• A. Violet colour
• B. Reddish colour
• C. Bluish black colour
• D. Yellowish colour

Answer 1

Answer: (C)

Bluish black colour

Starch is the most common carbohydrate in the human diet and is contained in many staple foods. Iodine solution is used to test the presence of starch in food materials. When iodine solution is added to a food item, it turns into blue-black colour if starch is present. If starch is not present, then the color will stay orange or yellow.

So, the answer is 'Bluish black colour'.