Which property describes the quality of being capable of being liquefied by heat?

• A. Elasticity
• B. Tightness
• C. Fusibility
• D. Conductivity

Answer: (C)

Fusibility describes the ability of a material to melt when heated. This property tells you how a substance responds to heat by changing from a solid into a liquid, which is exactly what “liquefied by heat” means. Elasticity, on the other hand, refers to a material’s tendency to deform and return to its original shape after a force is removed. Tightness relates to how well something seals or resists leakage, not melting. Conductivity is about how well a material conducts heat or electricity, not whether it melts. So the term that fits being liquefied by heat is fusibility.