Which type of change occurs when water is frozen into ice?

• A. Chemical change
• B. Nuclear change
• C. Electrochemical change
• D. Physical change

Answer: (D)

Verified step by step guidance

1. Step 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 new substances with different properties.
2. Step 2: Consider the process of freezing water. When water freezes, it changes from liquid to solid (ice), but the molecular structure of H\_2O remains the same.
3. Step 3: Recognize that no new substances are formed during freezing; only the state of matter changes.
4. Step 4: Recall that nuclear changes involve changes in the nucleus of atoms, which does not happen in freezing water.
5. Step 5: Conclude that freezing water is a physical change because it involves a change in state without altering the chemical identity of the substance.