Which of the following processes is considered a chemical change ?
I. Corrosion of aluminum metal
II. Digesting a candy bar.
III. Melting of ice.

Question

Quizplus · Accepted Answer

I. Corrosion of aluminum metal involves a chemical reaction between the metal and oxygen in the air, resulting in the formation of a new compound (aluminum oxide). 
II. Digesting a candy bar involves a chemical reaction between the enzymes in our digestive system and the molecules in the candy, breaking them down into smaller molecules that can be absorbed by the body. 
III. Melting of ice is a physical change, as it involves a change in state from solid to liquid without any chemical reactions occurring.

Which of the Following Processes Is Considered a Chemical Change