Single correct option
Which one of the following metals is liquid at room temperature?
- A. Sodium
- B. Zinc
- C. Lead
- D. Mercury
Show answer and solution
Answer: (D) Mercury
Mercury has a melting point of about -39 degrees Celsius, so it is the only common metal that is liquid at room temperature, which is why it is used in thermometers and barometers. Sodium, zinc and lead are solids with melting points of about 98, 420 and 327 degrees Celsius respectively. Gallium and caesium melt only slightly above room temperature.
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