Question

Question 9 (1 point)

Which of the following choices is not a sign of a chemical reaction occurring?
A. Temperature change
B. Gas produced
C. Unexpected color change
D. Change in size
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Answer 1

Changes in size are usually physical changes, not signs of a chemical reaction.

Step-by-step explanation:

A. Temperature change, B. Gas produced, and C. Unexpected color change are all signs of a chemical reaction occurring. However, D. Change in size is not a sign of a chemical reaction. Changes in size are usually physical changes, such as melting or dissolving, rather than chemical reactions.

Learn more about Signs of a chemical reaction