Verification of truth — Boiling point and pressure Statements: (1) Water boils at 100°C. (2) Water freezes at 0°C. Conclusion: At low pressure, water boils at a lower temperature. Is the conclusion true?

Introduction / Context:This item checks scientific understanding of how pressure affects boiling point. Though the statements cite the standard reference points (100°C boiling and 0°C freezing at 1 atm), the conclusion asks a general physical truth.

Concept / Approach:According to phase-equilibrium principles, lowering external pressure lowers the boiling temperature of a liquid.

Step-by-Step Solution:At sea level (≈1 atm), pure water boils at ≈100°C.At reduced pressure (e.g., high altitudes or in a vacuum), the temperature at which vapor pressure equals external pressure is lower; hence water boils at a lower temperature.

Why Other Options Are Wrong:“false” contradicts established thermodynamics; “either probably …” introduces unwarranted uncertainty; “Irrelevant” ignores the direct linkage between pressure and boiling point.

Final Answer:True