A liquid in a test tube has a curved surface such that the edges touching the glass are higher than the surface at the center. This must mean that the cohesive forces are less than the adhesive forces. True/False

Question

Physics

Ivy Mcbride

4 September, 16:16

A liquid in a test tube has a curved surface such that the edges touching the glass are higher than the surface at the center. This must mean that the cohesive forces are less than the adhesive forces. True/False

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Answers (1)

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Alexa Boyer · Answer 1

False

Explanation:

The cohesive forces of the liquid are greater than the adhesive forces hence the liquid is drawn inwards instead of spreading out. cohesion refers to the force of attraction between molecules of the same kind. it keeps molecules of the same kind together. It prevents the liquid from spreading out and wetting the glass hence the liquid will have a curved surface when in contact with the glass and this curved surface will be higher than the surface at the center. When the adhesive forces are greater, the curved surface will be lower than the surface at the center.