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mediumQ. No. 15116-what-is-the-boiling-point-of-mercury-hg
What is the boiling point of Mercury (Hg)?
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A100°C
B212°C
C357°C
D450°C
Correct Answer: 357°CYour Answer: C
Explanation
Mercury's boiling point is an important physical property tested frequently in competitive exams. Option A (100°C) is incorrect — 100°C is the boiling point of water (at standard atmospheric pressure), not mercury. Confusing water and mercury boiling points is a common mistake. Option B (212°C) is incorrect — 212°F is the boiling point of water in Fahrenheit scale. It does not correspond to mercury's boiling point. Option C (357°C) is CORRECT — Mercury boils at 357°C (630 K approximately). This high boiling point makes mercury excellent for high-temperature thermometers. Mercury remains in liquid state from its freezing point (-39°C) to its boiling point (357°C) — a range of 396°C. This wide liquid range is why mercury is preferred in laboratory thermometers for general use. Option D (450°C) is incorrect — 450°C is higher than mercury's actual boiling point of 357°C. No such standard thermodynamic property equals 450°C for mercury.
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