Physics – Surface Tension and Capillary Action

1. Which among the following factors affect Surface Tension?

  1. Color and smell
  2. Size and shape
  3. Mass and volume
  4. Temperature and nature of liquid
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Answer: Option D. Temperature and nature of liquid

2. Which property of a liquid causes its free surface to have minimum surface area?

  1. Viscosity
  2. Density
  3. Surface tension
  4. Thermal conductivity
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Answer: Option C. Surface tension

3. What is the effect of the increase in temperature on the surface tension of liquid?

  1. It decreases the surface tension
  2. It increases viscosity
  3. It turns into the gas phase
  4. It doesn’t affect it at all
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Answer: Option A. It decreases the surface tension

4. What is the reason behind a tiny droplet of liquid taking on a spherical shape?

  1. The law of gravity
  2. The phenomenon of surface tension
  3. The concept of density
  4. The principle of viscosity
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Answer: Option B. The phenomenon of surface tension

5. Which statement is correct regarding Surface Tension?

  1. It’s the property that enables a liquid to resist an external force
  2. It’s responsible for changing a liquid into a solid
  3. It determines how much heat can be transferred through a substance
  4. It’s the elastic tendency of a fluid surface that makes it acquire the least surface area possible
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Answer: Option D. It’s the elastic tendency of a fluid surface that makes it acquire the least surface area possible