Which one of the following represents a chemical change
A) boiling water to form steam
B) burning a piece of coal
C) heating lead until it melts
D) mixing iron filings and sand at room temperature
E) breaking glass

Question

Quizplus · Accepted Answer

Burning a piece of coal is a chemical change as it involves a chemical reaction where the coal combines with oxygen to produce new substances such as carbon dioxide and water vapor. The other options involve physical changes, such as changes in state (A and C), mixing (D), or breaking (E) of substances.

Which One of the Following Represents a Chemical Change