Which of the following processes is an example of a chemical change?

• A. Breaking glass
• B. Melting ice
• C. Burning a match
• D. Boiling water

Answer: (C)

Verified step by step guidance

1. Understand the difference between physical and chemical changes. A physical change affects the form of a substance but not its chemical composition, while a chemical change results in the formation of one or more new substances with different properties.
2. Analyze each option to determine if the substance's chemical identity changes: Breaking glass changes the shape but not the chemical composition, so it is a physical change.
3. Melting ice involves changing from solid to liquid water, which is a phase change and does not alter the chemical composition, so it is a physical change.
4. Burning a match involves a chemical reaction where new substances (such as gases and ash) are formed, indicating a chemical change.
5. Boiling water is a phase change from liquid to gas and does not change the chemical identity of water, so it is a physical change.