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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
Ideal gas
Solids
Liquids
3)
Which of the following liquids show capillary depression?
Mercury
Glycerine
Water
None of these.
4)
Where do we find adhesive force?
All of the above.
Between different molecules.
Between similar molecules.
Between polar molecules.
5)
Choose the correct statement.
Cohesive force of mercury is larger than that of water.
Water sticks to the glass of windows due to adhesion.
The S.I. unit of surface tension is N/m.
All of the above.
6)
Liquids which have more adhesive force than cohesive force show ________.
Convex meniscus
Plane meniscus
No fixed shape
Concave meniscus
7)
What is the angle of contact for water and glass?
90⁰
0⁰
180⁰
8⁰
8)
What happens in the capillary rise of a liquid, when the radius of the capillary tube increases?
Decreases.
Remains unchanged.
Increases.
Become zero.
9)
When there are no external forces, what is the shape of a liquid drop determined by?
Viscosity.
Surface tension.
Gravitational force.
None of these.
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 19 September 2018, from amrita.olabs.edu.in/?sub=1&brch=5&sim=224&cnt=540
