Which of the following would NOT be evidence of a chemical change?

• A. Melting of ice
• B. Formation of a precipitate
• C. Change in color
• D. Production of a gas

Answer: (A)

Verified step by step guidance

1. Understand the definition of a chemical change: it involves the formation of one or more new substances with different properties from the original substances.
2. Identify common signs of chemical changes, such as formation of a precipitate, change in color, and production of a gas, all of which indicate new substances are formed.
3. Recognize that melting of ice is a physical change because it only involves a change in the state of matter (solid to liquid) without altering the chemical composition of water.
4. Compare each option to determine which one does not involve the creation of new substances or a chemical reaction.
5. Conclude that melting of ice is NOT evidence of a chemical change, while the other options are typical indicators of chemical changes.