Multiple choice

Which of the following colours would you observe when iodine solution is added to starchy food?

  1. Violet

  2. Blue-black

  3. Pink

  4. Green

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The presence of any nutrient can be tested and confirmed by particular tests. Example: The presence of proteins can be tested by using copper sulphate and caustic soda. Oily patch on paper when a food product is kept over it, confirms the presence of fats. The addition of iodine turns the starchy food to blue-black.