Question

Which of the following is the best indication that a chemical change has taken place?

a. The matter changes color.
b. A mixture separates into layers.
c. The change is reversible.
d. The shape of the substance changes.

Answer 1

C the change is reversible I think

Answer 2

C

Step-by-step explanation:

It is C because the change is inversible, that means that it is a chemical change.