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Surface Tension Video Lecture - Class 11
FAQs on Surface Tension Video Lecture - Class 11
| 1. What is surface tension? |  |
Ans. Surface tension is a physical property of liquids that is caused by the cohesive forces between the molecules at the surface of the liquid. It is the measure of how difficult it is to break or stretch the surface of a liquid.
| 2. How is surface tension measured? | |
Ans. Surface tension can be measured using a device called a tensiometer. The tensiometer usually consists of a small container filled with the liquid, and a probe or needle that is used to measure the force required to stretch or break the liquid surface.
| 3. What factors affect surface tension? | |
Ans. Surface tension is affected by several factors, including temperature, presence of impurities, and the nature of the liquid. Generally, surface tension decreases with an increase in temperature and increases with an increase in the concentration of impurities.
| 4. What are some practical applications of surface tension? | |
Ans. Surface tension has various practical applications. For example, it helps insects like water striders walk on water, it helps in capillary action which allows plants to draw water from roots to leaves, and it is also used in various industrial processes such as foam formation, inkjet printing, and oil recovery.
| 5. How does surface tension contribute to the formation of droplets? | |
Ans. Surface tension plays a crucial role in the formation of droplets. When a liquid is exposed to the air, the cohesive forces between the liquid molecules cause the liquid to minimize its surface area, resulting in the formation of spherical droplets. This is because a sphere has the smallest possible surface area for a given volume, allowing the liquid to achieve a state of lower energy.
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Nov 08, 2024 Last updated |
Surface Tension for Class 112024 is part of Class 11 preparation. The notes and questions for Surface Tension
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