Mercury is an ideal barometric fluid mainly due to its __________________?
Correct answer: B. Very low vapor pressure
- A. High density
- B. Very low vapor pressure
- C. Low capillary action
- D. Low compressibility
Explanation
Mercury has very low vapour pressure, so its vapour contributes negligibly to the pressure reading in a barometer. Its high density also permits a short column, but low vapour pressure is the key property identified here.
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