Answer:
Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine.
Explanation:
The iodine molecule slips inside of the amylose coil. Iodine - KI Reagent: Iodine is not very soluble in water, therefore the iodine reagent is made by dissolving iodine in water in the presence of potassium iodide.