When water is heated, bubbles form in the water. Is this evidence of a chemical reaction? Why?
A) No, boiling water is a physical change.
B) Yes, the formation of a gas is evidence of a chemical reaction.
C) No, the formation of gas bubbles is a secondary chemical reaction which is ignored.
D) Yes, the formation of a gas is proof a new compound has been made.
E) none of the above
Answer: A