Which of the following is a feature of physical changes that applies to all substances?

• A. No new substances are formed during a physical change.
• B. The chemical composition of the substance is altered.
• C. Energy is always absorbed in a physical change.
• D. Physical changes are always irreversible.

Answer: (A)

Verified step by step guidance

1. Understand the definition of a physical change: it is a change that affects the form or physical properties of a substance without altering its chemical composition.
2. Recognize that during a physical change, the molecules or atoms of the substance remain the same; no new substances are created or destroyed.
3. Evaluate the options given: the statement 'No new substances are formed during a physical change' aligns with the definition of a physical change.
4. Consider the other options: 'The chemical composition of the substance is altered' describes a chemical change, not a physical one.
5. Note that energy changes and reversibility can vary depending on the specific physical change, so they are not universal features of all physical changes.