Question

1) In a chemical reaction, if a color change is detected, if an odor change is detected, or if a precipitate is formed, then:
A. a chemical reaction has definitely occurred
B. only physical reactions have occurred
C. a chemical reaction may have occurred
D. both physical and chemical reactions have definitely occurred

2) If different products are not created during a process, then a chemical reaction has not occurred.
A. True
B. False

Answer 1

1 c
2 true

A chemical reaction means a new product is formed