Which of the following is an extensive property of liquid benzene?

• A. Refractive index
• B. Density
• C. Boiling point
• D. Mass

Answer: (D)

Verified step by step guidance

1. Understand the difference between extensive and intensive properties: Extensive properties depend on the amount of substance present (e.g., mass, volume), while intensive properties do not depend on the amount (e.g., density, boiling point, refractive index).
2. Review each property given in the problem: Refractive index, density, and boiling point are all intensive properties because they remain the same regardless of the quantity of benzene.
3. Recognize that mass is an extensive property because it changes when the amount of benzene changes.
4. Confirm that the question asks for an extensive property, so the correct choice must be a property that depends on the amount of substance.
5. Conclude that among the options, mass is the extensive property of liquid benzene.