Question

1. Which of the following is true of a chemical reaction?
a. Only physical changes occur.
b. New substances must form.
c. Only changes of state occur.
d. Chemical properties remain the same.

Answer 1

B.) new substances must form

Answer 2

Answer:

I'm pretty sure it is "B: New Substances must form"

Explanation:

This is because two substances are being mixed together and cannot be reversed. Therefore, it creates a completely new substance.