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

• A. Density
• B. Compressibility
• C. Ability to undergo combustion
• D. Volume

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 the given options: Density, Compressibility, Ability to undergo combustion, and Volume.
3. Step 3: Recognize that Density, Compressibility, and Volume are physical properties because they describe measurable characteristics of gases without changing their chemical identity.
4. Step 4: Identify that the Ability to undergo combustion is a chemical property because it involves a chemical reaction where the substance changes into new products.
5. Step 5: Conclude that the property which is NOT a physical property of gases is the Ability to undergo combustion.