Surface Tension of Water by Capillary Rise and Effect of Detergents NEET Questions

Physics - Experimental Skills

Surface Tension of Water by Capillary Rise and Effect of Detergents MCQ Questions


1.
Surface tension is the property of a liquid surface by virtue of which it:
A.
Behaves like a stretched elastic membrane
B.
Conducts electricity
C.
Evaporates rapidly
D.
Becomes solid
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ANSWER :
A. Behaves like a stretched elastic membrane
2.
Surface tension is defined as:
A.
Pressure × volume of the liquid
B.
Energy per unit volume of the liquid
C.
Force per unit length acting tangentially to the liquid surface
D.
Force per unit area acting on the liquid surface
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ANSWER :
C. Force per unit length acting tangentially to the liquid surface
3.
The SI unit of surface tension is:
A.
N/m²
B.
N/m (newton per metre)
C.
N·m
D.
Pa
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ANSWER :
B. N/m (newton per metre)
4.
The dimensional formula of surface tension is:
A.
[MLT⁻²]
B.
[ML⁻¹T⁻²]
C.
[MT⁻²]
D.
[ML²T⁻²]
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ANSWER :
C. [MT⁻²]
5.
Surface tension can also be defined as:
A.
Volume per unit length
B.
Weight per unit area
C.
Density per unit area
D.
Surface energy per unit area of the liquid surface
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ANSWER :
D. Surface energy per unit area of the liquid surface
6.
Surface tension arises because:
A.
Surface molecules repel each other
B.
Liquids have no internal forces
C.
Air pressure on the surface is large
D.
Molecules at the surface experience a net inward attractive force from molecules below (asymmetric cohesive forces)
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ANSWER :
D. Molecules at the surface experience a net inward attractive force from molecules below (asymmetric cohesive forces)