Which is a chemical change?

Question

Quizplus · Accepted Answer

Silver tarnishing is a chemical change because the silver reacts with sulfur or other substances in the air and forms a new compound, which changes the physical and chemical properties of the silver. In contrast, melting of ice (A) and evaporation of alcohol (B) are physical changes because they do not involve any chemical reaction, only a change in state. Grinding rock into sand (C) is also considered a physical change because the composition of the rock remains the same, only its physical characteristics are altered.

Which Is a Chemical Change