Final answer:
Bleaching action is not a physical property because it involves a chemical reaction that changes the chemical composition of the substance, unlike boiling point, physical state, and color which are physical properties.
Step-by-step explanation:
In the context of chemistry, a physical property is a characteristic of matter that can be observed or measured without changing the substance's chemical composition. Examples of physical properties include boiling point, physical state, and color. These properties are evident through physical changes like melting, dissolving, or condensing, where the substance's form may alter but its chemical identity remains constant.
On the other hand, a chemical property describes a substance's ability to undergo a chemical reaction and form new substances, which involves a change in chemical composition. Therefore, among the options provided (boiling point, physical state, color, and bleaching action), the one that is not a physical property is bleaching action. This is because bleaching involves a chemical reaction where the substance (typically a bleach) reacts with other substances, altering their chemical structure to remove color.