Shapes of drops of liquid are spherical because of
Viscosity
Conductivity
Absorption
Surface tension
35 practice sets · Page 2 of 2
Shapes of drops of liquid are spherical because of
Viscosity
Conductivity
Absorption
Surface tension
Select the incorrect statement from the following option.
In case of mercury and glass, we observe a convex meniscus
Surface tension is responsible for the rise and fall of the capillary tubes
If two drops encounter each other, they tend to repel each other
All of the mentioned
Rain drops are spherical because of
Gravitational force
Surface tension
Air resistance
Low viscosity of water
Potential energy of a molecule on the surface of a liquid is as compare to another molecule inside of the liquid is
More
Less
Both a and b
None of these
On increasing the temperature, the surface tension of the liquid
Increases
Decreases
Remains constant
None of the mentioned
On increasing the temperature, the kinetic energy of the liquid molecules
Increases
Decreases
Remains constant
None of the mentioned
Meniscus of mercury in capillary is
Concave
Convex
Plane
Cylindrical
In flow field, point exist at surface of object where fluid is brought to rest by object is called
field point
surface point
stagnation point
object point
In case of water and glass, we get a concave meniscus because the adhesive force between water and glass are ...........than the cohesive forces between water molecules.
Weaker
Stronger
Same
None of the mentioned
If drops and bubbles do not collapse under the effect of gravity, it indicates that
pressure inside the drop is greater than outside
pressure inside the drop is lower than outside it
Surface tension is low
Viscosity is large
For a water does not wet a glass rod, the angle of contact is
Obtuse
Acute
0 degree
90 degree
For a liquid which is rising in a capillary, he angle of contact is
Obtuse
Acute
180 degree
90 degree
Excess pressure inside a bubble of radius r and of a liquid of surface tension T is
T/r
2T/r
3T/r
4T/r
By which phenomenon does the water rise from roots to leaves of plants
Capillary action
Surface Tension
Bernoullis Theorem
Viscosity
A liquid does not wet the surface of a solid if the angle of contact is
Zero
An acute one
45 degree
An obtuse one