Question
Download Solution PDFCapillary action of a liquid will take place only when
Answer (Detailed Solution Below)
adhesive forces are greater than the cohesive forces
Detailed Solution
Download Solution PDFThe correct answer is option 2) i.e. adhesive forces are greater than the cohesive forces
CONCEPT:
- Capillary action: Capillary action is the movement of a liquid along the surface of a solid due to the attraction of molecules of the liquid to the molecules of the solid.
- For capillary action to take place, the force between the liquid and solid must be greater than the intermolecular forces of the liquid.
- The force between two different types of molecules are called adhesive forces and the forces within the same type of molecules are called cohesive forces.
EXPLANATION:
- Capillary action occurs only when the liquid can move along the surface of another solid. This requires adhesive forces between the liquid and solid.
- If the cohesive forces within the liquid were greater, the surface tension of the liquid increases and it will try to occupy a lesser surface area possible.
- Hence, adhesive forces must be greater than the cohesive forces for capillary action to take place.
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