The rise of liquid in the capillary tube does not depend on:
Atmospheric pressure
Density of the liquid
Radius of the capillary
Temperature
Q.2.
Dimensional formula of surface tension is
[MLT].
[MT-2].
[M0T-2].
[ML2T-2].
Q.3.
The rise in the level of a liquid in a tube is h. What will be the rise in the level if the same amount of liquid is poured into a tube of half the diameter.
0
h/2
h
2h
Q.4.
Which one of the following is an example of capillary action
Absorption of ink
Floating of wood
Ploughing of field
Rise of oil into the wick
Q.5.
The surface of water in contact with glass will in the capillary tube is
Concave
Convex
Either concave or convex
Plane
Q.6.
Calculate the magnitude of capillary effect in millimeters in a glass tube of 7mm diameter, when immersed in mercury. The temperature of the liquid isand the values of surface tension of mercury atis 0.N/m. The angle of contact for mercury is 130°. The density of mercury is 13600kg.m-3.
1.40
2.80
1.70
2.10
Q.7.
If a glass tube ofmm diameter is immersed in water, what will be the rise or fall in mm in capillary? (Take surface tension = 0.N/m, g =m/s2 , ρw =kgm-3 and angle of contact = 0)
0.75
1.5
3
6
Q.8.
The rise in the water level in a capillary tube of radius 0.cm when dipped vertically in a beaker containing water of surface tension 0. Nm−1Nm^{-1}Nm−is (g= 10ms−210ms^{-2}10ms−)
2 cm
4 cm
1.5 cm
3 cm
Q.9.
Force of attraction between similar molecules is called
Cohesive force
Adhesive force
Magnetic force
gravitational force
Q.10.
solid-liquid adhesive force is less than cohesive force, the angle of contact is
zero
90
>>> 90
<<< 90
Q.11.
Water's ability to stick to glass is
adhesion
cohesion
surface tention
capillary action
Q.12.
What is adhesion?
Water's ability to stick to itself
Water's ability to stick to other substances
The strength of the cohesion of all the water molecules combined
Tape, glue and other adhesives
Q.13.
Describe COHESION.
Water molecules attracted to other substances.
Water molecules climbing upwards against the force of gravity.
Water molecules dissolving many substances because of its polarity.
Water molecules attracted to other water molecules.
Q.14.
Surface tension of water can be reduced by
heating
Adding soap solution
cooling
Both A & B
Q.15.
Water beads up on the surface of a penny because of this property.
Adhesion
High Surface Tension
Universal Solvent
Changes in Density
Q.16.
Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?
adhesion
surface tension
solvent properties
nonpolar
Q.17.
Surface tension is the property of water in which...
water molecules at the surface tend to stick together.
water tends to push up into a dome over a container before it finally spills..
water tends to be see-through.
Both A & B
Q.18.
Because of surface tension, you can put things into a full glass of water and...
the water will immediately spill.
the water won't spill for quite a while.
the water will never spill.
when the water spills, whatever you put in will also spill.
Q.19.
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
Q.20.
The surface tension of a soap solution is 0.03N/m.The work done to produce a soap bubble of radius 0.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
Support mcqgeeks.com by disabling your adblocker.
Please disable the adBlock and continue. Thank you.