Correct Answer - Option 4 : Cohesive Force between Molecules
The correct answer is Cohesive Force between Molecules.
CONCEPT:
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Surface Tension: The tendency of fluid at the surface to reduce its surface area is called surface Tension.
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Cohesive Force: The force acting between the same molecules of fluid attracting each other is called cohesive force.
- An example of this is the force between water molecules.
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Adhesive Force: The force acting between different molecules is called adhesive force.
- An example of adhesive force is fevicol which is used to stick two things with the help of adhesive force.
EXPLANATION:
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The cohesive force acts between molecules of water.
- It tends to contract the surface of a liquid to the smallest possible surface area.
- This causes surface tension in liquid.
- So, the cause of surface tension is the cohesive force between molecules.
Surface tension can cause small needles to flow on the surface of the water, even if the density of the needle is more than water.
