Quiz  /  Surface Tension MCQ

  • 1. 
    When there are no external forces, the shape of a liquid drop is determined by

  • Surface Tension of the liquid
  • The density of the liquid
  • The viscosity of the liquid
  • The temperature of air only

  • 2. 
    If T is the surface tension of the soap solution, the amount of work done in blowing a soap bubble from diameter D to a diameter 2D is

  • 2πD
  • T
  • 4πD
  • T
  • 6πD
  • T
  • 8πD
  • T

  • 3. 
    If the surface of a liquid is plane, then the angle of contact of the liquid with the walls of the container is

  • Acute angle
  • Obtuse angle
  • 90
  • 0

  • 4. 
    Raindrops are spherical in shape because of

  • Capillary
  • Surface Tension
  • Downward motion
  • Acceleration due to gravity

  • 5. 
    In a surface tension experiment with a capillary tube, the water rises up to 0.1m. If the same experiment is repeated on an artificial satellite which is revolving around the earth. The rise of water in a capillary tube is

  • 0.1 m
  • 9.8 m
  • 0.98 m
  • Full length of the capillary tube

  • 6. 
    At the critical temperature, the surface tension of the liquid

  • Is zero
  • Is infinity
  • Is the same as that at the other temperature
  • Cannot be determined

  • 7. 
    The surface of the water in contact with the glass wall is

  • Plane
  • Concave
  • Convex
  • Both a and b

  • 8. 
    When a soap bubble is charged

  • It contracts
  • It expands
  • It does not undergo any change in size
  • None of these

  • 9. 
    If common salt is dissolved in water, then the surface tension of saltwater is

  • Increased
  • Decreased
  • Not changed
  • First increases then decrease

  • 10. 
    A drop of oil is placed on the surface of the water. Which of the following statements is correct?

  • It will remain on it as a sphere
  • It will spread as a thin layer
  • It will partly be as spherical droplets and partly as thin films
  • It will float at the distorted drop on the water surface.
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