Which term best describes the process by which one or more substances change to produce one or more different substances?

• A. Evaporation
• B. Mixture formation
• C. Physical change
• D. Chemical reaction

Answer: (D)

Verified step by step guidance

1. Understand the key concept: The question asks for the term that describes a process where substances change to form different substances, indicating a transformation at the molecular or atomic level.
2. Review each option: Evaporation is a physical process where a liquid changes to a gas without changing its chemical identity.
3. Mixture formation involves physically combining substances without changing their individual chemical identities.
4. Physical change refers to changes in physical properties (like shape or state) without altering the chemical composition of the substance.
5. A chemical reaction is the process where one or more substances undergo a chemical change to form new substances with different properties and compositions.