Which of the following is a chemical property of a substance?

• A. Reactivity
• B. Ductility
• C. Conductivity
• D. Texture

Answer: (A)

Verified step by step guidance

1. Understand the difference between physical and chemical properties. Physical properties can be observed or measured without changing the substance's identity, while chemical properties describe how a substance interacts with other substances, leading to a change in its composition.
2. Review each option and classify it as either a physical or chemical property:
3. - Ductility: This is a physical property describing how a material can be stretched into a wire without breaking.
4. - Conductivity: This is a physical property that measures how well a substance can conduct electricity or heat.
5. - Texture: This is a physical property related to the feel or appearance of a surface.
6. - Reactivity: This is a chemical property because it describes how a substance undergoes chemical changes when it interacts with other substances.
7. Conclude that the correct answer is the property that involves a chemical change, which is Reactivity.