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