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If angle of contact of a drop of liquid is acute, then
- a)cohesion is equal to adhesion
- b)cohesion is more than adhesion
- c)adhesion is more than cohesion
- d)both adhesion and cohesion have no connection with angle of contact
Correct answer is option 'C'. Can you explain this answer?
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If angle of contact of a drop of liquid is acute, thena) cohesion is ...
If contact angle of liquid is acute, that means the liquid can easily wet the surface i.e., the force of adhesion between the liquid and surface is stronger than the cohesive forces acting between the molecules of the liquid. Example: water
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If angle of contact of a drop of liquid is acute, thena) cohesion is ...
Angle of Contact and Cohesion vs. Adhesion
Explanation:
When the angle of contact of a drop of liquid is acute, it means that the liquid wets the surface well. In such a case, adhesion (attraction between liquid and solid) is more dominant than cohesion (attraction between molecules of the liquid). This is because the liquid molecules are more attracted to the solid surface than to each other.
Implications of an Acute Angle of Contact:
1. Adhesion is more than Cohesion:
- The liquid spreads out on the solid surface, indicating a stronger interaction between the liquid and the solid.
- This results in a lower angle of contact, making it acute.
2. Effect on Cohesion vs. Adhesion:
- Since adhesion is more dominant in this scenario, the liquid molecules are more likely to adhere to the solid surface rather than stay together as a cohesive unit.
- This leads to a lower tendency for the liquid to form droplets or maintain its shape independently.
3. Relation to Angle of Contact:
- The angle of contact is a crucial factor in determining the balance between cohesion and adhesion in a liquid-solid interface.
- An acute angle of contact signifies a stronger adhesive force, which overcomes the cohesive forces within the liquid.
In conclusion, when the angle of contact of a liquid droplet is acute, it indicates that adhesion is more dominant than cohesion. This relationship between the angle of contact and the relative strengths of cohesion and adhesion plays a significant role in understanding the behavior of liquids on solid surfaces.
Explanation:
When the angle of contact of a drop of liquid is acute, it means that the liquid wets the surface well. In such a case, adhesion (attraction between liquid and solid) is more dominant than cohesion (attraction between molecules of the liquid). This is because the liquid molecules are more attracted to the solid surface than to each other.
Implications of an Acute Angle of Contact:
1. Adhesion is more than Cohesion:
- The liquid spreads out on the solid surface, indicating a stronger interaction between the liquid and the solid.
- This results in a lower angle of contact, making it acute.
2. Effect on Cohesion vs. Adhesion:
- Since adhesion is more dominant in this scenario, the liquid molecules are more likely to adhere to the solid surface rather than stay together as a cohesive unit.
- This leads to a lower tendency for the liquid to form droplets or maintain its shape independently.
3. Relation to Angle of Contact:
- The angle of contact is a crucial factor in determining the balance between cohesion and adhesion in a liquid-solid interface.
- An acute angle of contact signifies a stronger adhesive force, which overcomes the cohesive forces within the liquid.
In conclusion, when the angle of contact of a liquid droplet is acute, it indicates that adhesion is more dominant than cohesion. This relationship between the angle of contact and the relative strengths of cohesion and adhesion plays a significant role in understanding the behavior of liquids on solid surfaces.
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If angle of contact of a drop of liquid is acute, thena) cohesion is equal to adhesionb) cohesion is more than adhesionc) adhesion is more than cohesiond) both adhesion and cohesion have no connection with angle of contactCorrect answer is option 'C'. Can you explain this answer?
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