Final answer:
Combustibility is not a physical property but a chemical property, as it changes the substance's chemical composition. Conductivity, malleability, and elasticity are physical properties because they can be measured without altering the substance itself.
Step-by-step explanation:
To determine which of the provided options is not a physical property, we must first understand what a physical property is. A physical property is a characteristic that can be observed or measured without changing the substance’s chemical identity. Examples include color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point.
Given the options:
- A) combustibility
- B) conductivity
- C) malleability
- D) elasticity
‘Combustibility’ is the correct answer, as it is not a physical property but rather a chemical property. This is because combustibility involves a substance’s ability to undergo a chemical reaction to catch fire, which changes the substance’s chemical identity. On the other hand, conductivity, malleability, and elasticity are all physical properties as they can be observed without changing the substance’s composition.