1.
Why a small liquid drop is in spherical shape?
A
due to surface tension
B
due to low viscosity
C
due to hydrogen bonding
D
due to low density
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35 practice sets · Page 1 of 2
Why a small liquid drop is in spherical shape?
due to surface tension
due to low viscosity
due to hydrogen bonding
due to low density
Which of the following is correct about Surface Tension?
It is a scalar quantity
It is a molecular phenomenon
Its root cause is the electromagnetic forces
All of the above
Which of the following is an application of surface tension?
Use of soaps and detergents as cleansing agents
Molecular structure can be elucidated by surface tension measurements through parachor values
Surfactants are incorporated in preparations like toothpaste
All of the mentioned
Which of the following factors affect the Surface Tension?
Nature of liquid
Area of Surface
Both a and b
None of the above
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
Which is correct about the height of a capillary column of a liquid, at a particular temperature, as per Jurin's law?
equal to the diameter of the tube
directly proportional to the diameter of the tube
inversely proportional to the diameter of the tube
half of the diameter of the tube
When will the height of water in capillary tube be minimum?
When water temperature is 0 degree C
When water temperature is 4 degree C
When water temperature is -4 degree C
None of the above
When impurity is added to a liquid, its surface tension
decreases
first decreases and then
increases increases
remains same
What will be the change in the height of water in a capillary tube in stationary condition on earth if the same tube is taken in a lift going downward with acceleration?
height increases
height decreases
Remains same
can decrease or increase
What is the shape of meniscus when angle of contact is greater than 90 degree?
Concave
Convex
Plane
None of the above
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 is the main cause of capillarity?
difference in weight of fluids
pressure difference
temperature difference
velocity gradient
The unit of surface tension in the CGS system is
N/m
Kg/cm
Dynes/cm
Dynes/m
The surface tension of water at 250C is
90.0 dynes/cm
45.63 dynes/cm
82.5 dynes/cm
72.14 dynes/cm
The surface tension of a liquid is T. the increase in its surface energy on increasing the surface area by A is
AT-1
AT
A2T
A2T2
The pressure just below the meniscus of water
Is greater than just above it
Is less than just above it
Is same as just above it
Is always equal to atmospheric pressure.
The apparatus used for the determination of surface tension of a liquid is
Oedometer
Stalagmometer
Consolidometer
None of the mentioned
The angle of contact for liquid on a solid surface is the angle between:
the tangent to the liquid surface at the point of contact and the solid surface
the tangent to the solid surface at the point of contact and the liquid surface
the liquid surface and the solid surface at the point of contact
none of the above.
Surface tension of liquid is independent of the
Temperature of the liquid
Area of the liquid surface
Nature of the liquid
Impurities present in the liquid
Stalagmometer is cleaned to remove grease with the help of
Chromic acid
Sulphuric acid
Distilled water
Tartaric acid