Which of the following is a chemical property?

CONCEPT:

Chemical vs Physical Properties

• Chemical properties are characteristics of a substance that become evident during a chemical reaction; they include reactivity, combustibility, and acidity.
• Physical properties can be observed or measured without changing the composition of matter; they include melting point, boiling point, and density.

EXPLANATION:

• Among the given options:
  • Melting point, boiling point, and density are physical properties because they can be observed without altering the chemical structure of the substance.
  • Combustibility is a chemical property because it describes how a substance reacts with oxygen to produce heat and light during combustion.
• Therefore, the correct answer is:
  • Option 1, 2, and 3 are physical properties.
  • Option 4 (Combustibility) is a chemical property.

Therefore, the option that is a chemical property is Combustibility.