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Class 11
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Surface Tension
Surface Tension
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1)
Why are rain drops spherical in shape?
Surface tension.
Capillarity.
Acceleration due to gravity.
Downward movement.
2)
The force of cohesion is maximum in ________.
Liquids
Solids
Ideal gas
Gases
3)
Which of the following liquids show capillary depression?
None of these.
Water
Mercury
Glycerine
4)
Where do we find adhesive force?
All of the above.
Between polar molecules.
Between similar molecules.
Between different molecules.
5)
Choose the correct statement.
The S.I. unit of surface tension is N/m.
Cohesive force of mercury is larger than that of water.
All of the above.
Water sticks to the glass of windows due to adhesion.
6)
Liquids which have more adhesive force than cohesive force show ________.
No fixed shape
Plane meniscus
Concave meniscus
Convex meniscus
7)
What is the angle of contact for water and glass?
90⁰
8⁰
0⁰
180⁰
8)
What happens in the capillary rise of a liquid, when the radius of the capillary tube increases?
Increases.
Decreases.
Remains unchanged.
Become zero.
9)
When there are no external forces, what is the shape of a liquid drop determined by?
Gravitational force.
Viscosity.
None of these.
Surface tension.
10)
If the angle of contact between a solid and a liquid is 90⁰, then:
Cohesive force > adhesive force
Cohesive force >> adhesive force
Cohesive force = adhesive force
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Cite this Simulator:
amrita.olabs.edu.in,. (2015). Surface Tension. Retrieved 20 September 2017, from amrita.olabs.edu.in/?sub=1&brch=5&sim=224&cnt=540
