Question

Why is surface tension of water higher than alcohol?

Answer 1

when two or more water molecules interact they form what is known as a hydrogen & the positive oxygen of an adjacent molecule .this intermolecular attraction also gives water it's strong surface tension force.

Answer 2

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A greater degree of hydrogen-bonding means the molecules are attracted to each other effectively . That is, they stick close together well, and thus, are hard to break apart. Therefore, since water molecules on a liquid surface are harder to push down on the surface tension is higher for water than for ethyl alcohol.