Question

1. Which sign is NOT for a chemical change?

Answer 1

Hi!
During a chemical reaction, some of the basic signs that a chemical reaction is occurring is a color change and heat / light also burning . You can clearly see these changes happening

But changes in volume is a physical property, not a chemical.

I hope this helps!

Answer 2

B.Change in volume Because if it Changes colors or heats up that means a chemical reaction is happening or has happend