Which of the following is NOT a likely indicator of a chemical change?

• A. Change in color
• B. Formation of a precipitate
• C. Production of a gas
• D. Change in state from solid to liquid

Answer: (D)

Verified step by step guidance

1. Understand that a chemical change involves the formation of new substances with different properties, while a physical change affects only the state or appearance without changing the substance's identity.
2. Review the common indicators of chemical changes, which typically include change in color, formation of a precipitate, and production of a gas, as these suggest new substances are formed.
3. Recognize that a change in state from solid to liquid (melting) is a physical change because it only alters the physical form, not the chemical composition of the substance.
4. Compare each option to determine which one does not indicate a chemical change; since change in state is a physical change, it is NOT a likely indicator of a chemical change.
5. Conclude that the correct answer is the change in state from solid to liquid, as it does not involve the creation of new substances.