Question

which of these is an example of a physical property? chlorofluorocarbons (cfcs) react with ozone (o₃). chlorine oxidizes bacterial cells. chlorine gas is yellow - green in color. potassium ignites when placed in water.

Explanation:

A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical composition. Color is a physical property. Reacting with ozone (CFCs reacting with \(O_3\)), oxidizing bacterial cells (chlorine oxidizing bacterial cells), and igniting in water (potassium igniting in water) all involve chemical changes and are chemical properties.

Answer:

Chlorine gas is yellow - green in color.