Which of the following observations BEST demonstrates water’s special property of cohesion?
A. A spoon held near a stream of water from a tap deflects the water towards itself.
B. A rainbow firms after a rain storm
C. Water forms droplets of dew on a spider web in the morning.
D. Water can dissolve other substances such as sugar and salt

Respuesta :

The cohesive strength of water molecules with each other creates superficial tension, which provides resistance to the liquid surface. The option that demonstrates water’s property of cohesion is option C. water forms droplets of dew on a spider web in the morning.

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Water cohesion property refers to the existing attraction strength that molecules exhibit with each other. Water molecules bind by hydrogen bonds.

Cohesive strength creates superficial tension, which refers to the resistance of a liquid surface to break when exposed to any stress factor.

This superficial tension makes water form spheric drops on the surfaces and bonds tied enough to support light objects over them.

In the interior of the water mass, molecules form hydrogen bonds with all molecules around them. However, those that remain on the surface are also in touch with air, so they have fewer water molecules to form hydrogen bonds with. So the bonds formed between them will be even stronger.

We can easily see this phenomenon in everyday life. For instace,

  • Rain drops in the window glass
  • Water drops in a glass of cold water
  • Water droplets on a spider web
  • An insect moving over the water surface

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Related link: https://brainly.com/question/4971395?referrer=searchResults