Which property of matter depends on the amount of substance? MCQ with Answer and Explanation

Mass is an extensive property, meaning it depends on the quantity of matter. Density, boiling point, and refractive index are intensive properties that remain constant regardless of the amount of substance. Intensive properties are useful for identifying substances. For example, pure water boils at 100°C at 1 atm irrespective of whether you have 10 mL or 10 L. Exam trick: Extensive properties like mass, volume, and length add up when you combine samples; intensive properties do not.