Question

A chemistry class is experimenting with iodine to see which common white powder items will react and make the iodine change color. Which item listed will have a chemical reaction with iodine?

Answer 1

The answer is:

d) cornstarch

Answer 2

The question did not contain any listed options. However, starch is a common white powder that will give a color change on reacting with iodine molecules

Step-by-step explanation:

Iodine is a common indicator used in the lab to detect the presence of starch or starchy substances.

Iodine molecules react with amylose in starch to form a complex with a deep blue-black coloration.

Hence, a common white powder which reacts with iodine molecules to give a blue-black color must be a substance that contains starch.