What is the primary cause of surface tension?
a) Gravitational force
b) Adhesive forces between molecules
c) Cohesive forces between molecules
d) Electromagnetic forces
Which of the following best describes surface tension?
a) The force per unit length that acts along the surface of a liquid
b) The force that acts on the entire volume of a liquid
c) The pressure within a liquid
d) The attraction between solid and liquid molecules
Which of the following liquids has the highest surface tension at room temperature?
a) Water
b) Mercury
c) Alcohol
d) Oil
In capillary action, the liquid rises in a narrow tube due to:
a) Surface tension and adhesive forces
b) Gravitational forces and cohesive forces
c) Viscosity and cohesive forces
d) Adhesive forces and temperature variation
Which of the following is true for a liquid with high surface tension?
a) The liquid has a strong tendency to form droplets
b) The liquid easily spreads over surfaces
c) The liquid has a high vapor pressure
d) The liquid has low cohesion between molecules
The height to which a liquid rises in a capillary tube depends on all of the following EXCEPT:
a) Surface tension
b) Radius of the capillary tube
c) Density of the liquid
d) Length of the capillary tube
What happens to the surface tension of water when detergent is added?
a) It increases
b) It decreases
c) It remains unchanged
d) It evaporates
Which of the following phenomena is explained by surface tension?
a) The formation of water droplets
b) The flow of air over an airplane wing
c) The rise of mercury in a barometer
d) The diffusion of gases in the air
Capillary rise is greater in a tube with:
a) Smaller diameter
b) Larger diameter
c) Increased temperature
d) Increased viscosity
Which of the following liquids will exhibit the highest capillary rise?
a) Water
b) Mercury
c) Oil
d) Glycerin
In the capillary tube experiment, the liquid rises higher in a narrow tube due to:
a) Surface tension and adhesion
b) Cohesion and gravity
c) Gravitational forces alone
d) Viscosity of the liquid
The phenomenon of capillarity can be explained by:
a) Only cohesive forces
b) Only adhesive forces
c) A combination of cohesive and adhesive forces
d) None of the above
Which of the following factors does NOT affect the height of capillary rise?
a) Surface tension
b) Density of the liquid
c) Diameter of the capillary tube
d) Atmospheric pressure
In capillarity, when the adhesive forces between liquid and solid are greater than the cohesive forces within the liquid, the liquid will:
a) Rise in the tube
b) Fall in the tube
c) Remain at a constant level
d) Not move at all
The height to which water rises in a capillary tube is inversely proportional to:
a) The surface tension of the liquid
b) The square of the radius of the tube
c) The density of the liquid
d) The temperature of the liquid
In a capillary tube, if the liquid does not wet the surface of the tube, the liquid will:
a) Rise in the tube
b) Fall in the tube
c) Remain at the same level
d) Form bubbles at the surface
Which of the following is NOT a property affected by surface tension?
a) The shape of water droplets
b) The ability of insects to walk on water
c) The formation of meniscus in a tube
d) The boiling point of the liquid
Which of the following explains the formation of a meniscus in a capillary tube?
a) Cohesive forces between molecules
b) Adhesive forces between liquid and tube
c) Gravitational forces
d) Surface tension acting at the boundary
When water is placed in a capillary tube, the surface tension of the water causes the liquid to:
a) Sink
b) Form a concave meniscus and rise
c) Form a convex meniscus and fall
d) Evaporate
What happens to the surface tension of a liquid if its temperature is increased?
a) It increases
b) It decreases
c) It remains the same
d) It evaporates
Which of the following is an example of surface tension?
a) A needle floating on water
b) Water dripping from a tap
c) Water flowing through a hose
d) Air bubbles in a glass of soda
The effect of surface tension is more prominent in liquids with:
a) Low viscosity
b) High viscosity
c) High temperature
d) Low density
Which of the following liquids will have the lowest surface tension at a given temperature?
a) Water
b) Mercury
c) Alcohol
d) Oil
The angle of contact of a liquid with a solid surface is the smallest for:
a) Water on a glass surface
b) Mercury on a glass surface
c) Water on a wax surface
d) Alcohol on a wax surface
Which of the following is a result of surface tension in a liquid?
a) Formation of water droplets
b) Creation of a concave meniscus
c) Ability of insects to walk on water
d) All of the above
Which of the following describes the behavior of mercury in a capillary tube?
a) It rises in the tube due to adhesive forces
b) It falls in the tube due to cohesive forces
c) It remains at the same level
d) It rises in the tube due to capillary action
In which of the following conditions does capillary rise occur?
a) Cohesive forces are stronger than adhesive forces
b) Adhesive forces are stronger than cohesive forces
c) Cohesive forces and adhesive forces are equal
d) No forces act on the liquid
