Question : Which of the following statements is not correct about surface tension?
Option 1: Surface tension is typically measured in dynes cm.
Option 2: The shape of the water drop is spherical due to surface tension.
Option 3: At room temperature, the surface tension of water is less than ethyl alcohol.
Option 4: The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.
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Correct Answer: At room temperature, the surface tension of water is less than ethyl alcohol.
Solution : The correct option is At room temperature the surface tension of water is less than ethyl alcohol .
Water has a greater surface tension than ethyl alcohol at a normal temperature. At room temperature, the surface tension of water is around 72 mN/m, whereas that of ethyl alcohol is roughly 22 mN/m. The higher degree of hydrogen bonding between water molecules in the bulk liquid is the cause of this discrepancy.
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