Which of the following was NOT one of the observations from the labs that indicated a chemical reaction was occurring?

Question

A) bubbles
B) gas forming
C) color change
D) All of the above was observed signs of a chemical reaction

Answer 1

D) All of the above was observed signs of a chemical reaction.

Bubbles (often indicating gas formation), gas forming, and color change are all common indicators of a chemical reaction occurring. Hence, all the options listed are signs of a chemical reaction.