Which term best describes the form of matter as a solid, liquid, or gas at a given temperature and pressure?

• A. Chemical state
• B. Physical state
• C. Phase
• D. State of matter

Answer: (B)

Physical state is the form matter takes under specific temperature and pressure, i.e., solid, liquid, or gas. This term directly describes how a substance exists under the given conditions, which matters for HazMat handling, containment, and hazard assessment. Chemical state refers to composition or bonding, not the observable form. Phase describes a homogeneous portion of matter within a system and can involve multiple forms in one sample; the physical state specifically names the observable form at those conditions. State of matter is a common way to say it, but the standard term used in HazMat contexts is physical state.