Question

Which of the following changes is exothermic in nature?​

• A. Evaporation of water
• B. Melting of ice
• C. Melting of wax
• D. Freezing of water

Answer 1

The correct option is D Freezing of water

An endothermic change is the one in which heat is absorbed by the system from the surrounding. In case of melting and evaporation, heat is required and hence heat is absorbed by the system. Meanwhile, in exothermic changes, heat is released by the system into the surrounding. For example, freezing and condensation. ​