Font size
WorksheetsSURFACE TENSION
Total questions: 15
Worksheet time: 22mins
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.
Refer to the picture of water sticking to a leaf; this is occurring because of:
Adhesion
Cohesion
Dimensional formula of surface tension is
[MLT].
[MT-2].
[M0T-2].
[ML2T-2].
The surface tension of a soap solution is 0.03N/m.The work done to produce a soap bubble of radius 0.05m is
1.6 x 10-3 J
2.6 x 10-3 J
1.6 x 10-6 J
1.88 x 10-3 J
The surface tension of a liquid is T. The increase in its energy on increasing the area of its surface by amount A is
TA
T2A
T
T2A2
The force required to seperate two glass plates of area
10-2m2 with a film of water 0.05mm thickness between them is (surface tension of water is 70 x 10-3N/m)
25N
20N
14N
28N
Define Molecular Range.
What is surface energy?
What do you mean by angle of contact?
