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WorksheetsPPI quizz
Total questions: 16
Worksheet time: 32mins
For a convex meniscus the angle of contact is (a)
How many free surfaces does a soap bubble has
one
two
four
none
How many free surfaces does a water drop has?
one
two
three
four
What is the property of a liquid due to which its free surface tries to have minimum surface area?
Viscosity
Buoyancy
Surface tension
Rigidity
What's the difference between Cohesion and Adhesion?
Cohesion is the attraction between the same substance and Adhesion is the attraction of different substances
they both attract different substances
They both attract the same substance
They don't attract anything
Which of the following contribute to the reason behind the origin of surface tension?
only cohesive forces
only adhesive forces
neither cohesive forces nor adhesive forces
both cohesive forces and adhesive forces
Which is the effect of increase in the temperature on the surface tension of the liquid?
it decreases
it increases
it remains the same
None of the above
What is the main cause of capillarity?
difference in weight of fluids
pressure difference
temperature difference
velocity gradient
The surface energy of a substance is defined as …
the energy required for the formation of a new unit area of surface.
the strength of the bonds that hold the substance together.
the energy released when a new unit area of surface is created.
the extent to which water wets the surface of the substance at room temperature.
The rain drops are in spherical shape due to
viscosity
thrust on drop
surface tension
residual pressure
surface tension of water can be reduced by
heating
Adding soap solution
cooling
adding salt
The SI unit of surface tension is:
a) Newton per meter (N/m)
b) Pascal per square meter (Pa/m^2)
c) Joule per cubic meter (J/m^3)
d) Kilogram per second (kg/s)
Which of the following phenomena is NOT a result of surface tension?
a) Formation of soap bubbles
b) Capillary action
c) Floating of a needle on water
d) Evaporation of a liquid
The property of surface tension is responsible for the shape of a liquid drop being:
a) Cylindrical
b) Spherical
c) Cubical
d) Pyramidal
The angle of contact between a liquid and a solid surface is minimum for a liquid with:
a) High surface tension
b) Low surface tension
c) Medium surface tension
d) No surface tension
