Question

Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation would most likely indicate that a chemical change has occurred in the substance?
A. If the substance is a liquid or solid, an increase in temperature would indicate a
chemical change.

B. If the substance is a liquid, a change of some of the liquid to a gaseous form would indicate a chemical change.

C. If the substance is a solid, a change of some of the solid to liquid form would indicate a chemical change.

D. If the substance is a liquid or solid, production of an odor would indicate a chemical change.

Answer 1

Answer: the answer is D

Explanation: