Appearance of colour on adding dilute iodine solution to the food item indicates the of starch.
Sudha took a small amount of an unknown food item in a test tube. Then, she added a few drops of iodine to it. The colour of the unknown food item changes to blue-black.
The change in colour of the food item to blue-black indicates the presence of
When iodine is added to starch solution, the solution turns ___ in colour.