Which of the following is NOT a physical property of matter?

• A. Density
• B. Boiling point
• C. Ability to rust
• D. Color

Answer: (C)

Verified step by step guidance

1. Step 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 a substance's ability to undergo chemical changes.
2. Step 2: Review each option to determine if it is a physical or chemical property. Density is a physical property because it involves mass and volume without changing the substance.
3. Step 3: Boiling point is a physical property because it describes the temperature at which a substance changes state from liquid to gas without altering its chemical composition.
4. Step 4: Color is a physical property because it is an observable characteristic that does not involve a chemical change.
5. Step 5: Ability to rust is a chemical property because rusting involves a chemical reaction (oxidation) that changes the substance's chemical identity.