Concept:Surface tension is the elastic tendency of a fluid surface which makes it acquire the least surface area possible. It is directly proportional to the strength of intermolecular forces pulling the surface molecules inward.
Formula:$$ \gamma \propto \text{Strength of IMF} $$
Solution:- Benzene and Ethers rely primarily on weak London dispersion and weak dipole-dipole forces.
- Alcohols possess hydrogen bonding, giving them moderate to high surface tension.
- Water (\( \text{H}_2\text{O} \)) is exceptionally unique because its small molecules can form up to four strong hydrogen bonds, creating a very tight, cohesive surface network.
- This results in water having the highest surface tension among common molecular liquids.
Why other options are incorrect:None of the other options can match the dense, multi-directional hydrogen bonding network found at the surface of liquid water.
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