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If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be
- a)higher than the surface of liquid
- b)the same as the surface of liquid
- c)lower than the surface of liquid
- d)unpredictable
- e)none of the above
Correct answer is option 'C'. Can you explain this answer?
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If cohesion between molecules of a fluid is greater than adhesion betw...
Cohesion and Adhesion in Fluids
In order to understand why the free level of fluid in a dipped glass tube will be lower than the surface of the liquid, we need to first understand the concepts of cohesion and adhesion in fluids.
Cohesion refers to the attraction between molecules of the same substance. It is the force that holds together the molecules within a liquid and gives it a certain degree of resistance to separation. Cohesion is responsible for the formation of surface tension, which is the tendency of the surface of a liquid to behave like a stretched elastic skin.
Adhesion, on the other hand, refers to the attraction between molecules of different substances. It is the force that causes a liquid to spread across or adhere to a solid surface. Adhesion is responsible for phenomena such as capillary action, where a liquid rises or falls in a narrow tube due to the balance between adhesive and cohesive forces.
Explanation of the Situation
In the given scenario, we are told that the cohesion between molecules of the fluid is greater than the adhesion between the fluid and the glass. This means that the cohesive forces within the fluid are stronger than the adhesive forces between the fluid and the glass surface of the tube.
Since the cohesive forces are stronger, the molecules within the fluid tend to stick together more strongly than they stick to the glass surface. This results in the formation of a concave meniscus, where the surface of the fluid in the tube is lower than the surface of the liquid outside the tube.
The concave meniscus is formed because the liquid molecules at the surface experience a net inward force due to the stronger cohesive forces within the fluid. This causes the liquid to curve downwards at the edges, resulting in a lower free level of fluid in the dipped glass tube.
Conclusion
In conclusion, when the cohesion between molecules of a fluid is greater than the adhesion between the fluid and the glass, the free level of fluid in a dipped glass tube will be lower than the surface of the liquid. This is due to the formation of a concave meniscus, caused by the stronger cohesive forces within the fluid.
In order to understand why the free level of fluid in a dipped glass tube will be lower than the surface of the liquid, we need to first understand the concepts of cohesion and adhesion in fluids.
Cohesion refers to the attraction between molecules of the same substance. It is the force that holds together the molecules within a liquid and gives it a certain degree of resistance to separation. Cohesion is responsible for the formation of surface tension, which is the tendency of the surface of a liquid to behave like a stretched elastic skin.
Adhesion, on the other hand, refers to the attraction between molecules of different substances. It is the force that causes a liquid to spread across or adhere to a solid surface. Adhesion is responsible for phenomena such as capillary action, where a liquid rises or falls in a narrow tube due to the balance between adhesive and cohesive forces.
Explanation of the Situation
In the given scenario, we are told that the cohesion between molecules of the fluid is greater than the adhesion between the fluid and the glass. This means that the cohesive forces within the fluid are stronger than the adhesive forces between the fluid and the glass surface of the tube.
Since the cohesive forces are stronger, the molecules within the fluid tend to stick together more strongly than they stick to the glass surface. This results in the formation of a concave meniscus, where the surface of the fluid in the tube is lower than the surface of the liquid outside the tube.
The concave meniscus is formed because the liquid molecules at the surface experience a net inward force due to the stronger cohesive forces within the fluid. This causes the liquid to curve downwards at the edges, resulting in a lower free level of fluid in the dipped glass tube.
Conclusion
In conclusion, when the cohesion between molecules of a fluid is greater than the adhesion between the fluid and the glass, the free level of fluid in a dipped glass tube will be lower than the surface of the liquid. This is due to the formation of a concave meniscus, caused by the stronger cohesive forces within the fluid.
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If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will bea)higher than the surface of liquidb)the same as the surface of liquidc)lower than the surface of liquidd)unpredictablee)none of the aboveCorrect answer is option 'C'. Can you explain this answer?
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