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

Question

A.cornstarch
B.baking soda
C.powdered sugar
D.salt

Answer 1

The item from the list that will have a chemical reaction with iodine is A. cornstarch.

When iodine interacts with cornstarch, it forms a blue-black complex due to the presence of amylose, a component of starch. The other items—baking soda, powdered sugar, and salt—do not typically react with iodine to produce a color change.