What is the boiling point of water on the Kelvin scale?

The Kelvin scale is the SI unit of temperature and is used in all scientific calculations. Option A (273 K) is incorrect — 273 K (more precisely 273.15 K) is the freezing point of water, not the boiling point. 273 K = 0°C = 32°F. Students frequently confuse 273 K (freezing) with 373 K (boiling). Option B (300 K) is incorrect — 300 K equals approximately 27°C, which is normal room temperature in warm conditions. It has no significance as the boiling point of water. Room temperature is typically taken as 300 K in many physics calculations for convenience. Option C (373 K) is CORRECT — the boiling point of pure water at standard atmospheric pressure on the Kelvin scale is 373.15 K (rounded to 373 K in competitive exams). The formula: K = °C + 273; so 100 + 273 = 373 K. Option D (473 K) is incorrect — 473 K equals 200°C, well above the boiling point of water. 473 K has no special significance in standard thermometry. Exam trick: K = C + 273. Freezing = 0 + 273 = 273 K. Boiling = 100 + 273 = 373 K. Body temp = 37 + 273 = 310 K.