Question

What are some indicators that a chemical reaction is occurring? Check all that apply.

A: the formation of bubbles
B: a change in size
C: a change in color
D: the formation of a liquid
E: the formation of a precipitate

Answer 1

Hi there! When a chemical Reaction happens, the tell tale signs are as listed:
~The chemical produces bubbles
~ The Chemical emits an odor 
~ The liquid forms a solid(Precipitate) 
~ There is a change of color 
~ And last but not least a change in temperature! 

Hope this can help! Good luck!