Which of the following has more surface tension at same temperature?
A
Water
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B
Mercury
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C
Ethanol
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D
Glycerin
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Solution
The correct option is B Mercury Surface Tension in a liquid is an innate property due to cohesion or attraction between molecules within the liquid. Mercury is a metal and thus has intermetallic bonds. These are far stronger than hydrogen bonds between molecules of other liquids such as water ethanol or glycerin.
Mercury has the highest surface tension among the given substance at same temperature.