1. What are adhesive forces?
A.
Forces between molecules of the same substance
B.
Forces between molecules of different substances
C.
Forces that act only in gases
D.
Forces caused by heating a liquid
Correct Answer:
Forces between molecules of different substances
Explanation:
Adhesive forces are attractive forces between unlike molecules, such as water molecules and glass molecules.
2. Which interaction is an example of adhesive force?
A.
Attraction between two water molecules
B.
Attraction between two mercury molecules
C.
Attraction between water and glass
D.
Attraction between two oil molecules
Correct Answer:
Attraction between water and glass
Explanation:
Adhesive force acts between different substances, so the attraction between water and glass is an example.
3. Why does water spread over a clean glass surface?
A.
Water has no surface tension
B.
Adhesive forces between water and glass are strong
C.
Cohesive forces in water are absent
D.
Glass repels all water molecules
Correct Answer:
Adhesive forces between water and glass are strong
Explanation:
Strong adhesion between water molecules and glass molecules makes water spread over the glass surface.
4. What is the main effect of strong adhesive forces between a liquid and a solid surface?
A.
The liquid is more likely to wet the solid
B.
The liquid always becomes a gas
C.
The solid melts immediately
D.
The liquid loses all its particles
Correct Answer:
The liquid is more likely to wet the solid
Explanation:
Strong adhesive forces attract the liquid to the solid surface and promote wetting.
5. Water rises in a narrow glass tube mainly because of attraction between:
A.
Water molecules and air molecules
B.
Glass molecules and air molecules
C.
Water molecules and glass molecules
D.
Two layers of glass molecules only
Correct Answer:
Water molecules and glass molecules
Explanation:
Adhesive forces between water and glass pull water upward along the walls of the narrow tube.
6. Which situation shows adhesive forces most clearly?
A.
Water sticking to the inside of a glass
B.
Water molecules remaining together in a drop
C.
Oil molecules attracting other oil molecules
D.
Gas particles moving apart in a container
Correct Answer:
Water sticking to the inside of a glass
Explanation:
Water sticking to glass results from attraction between unlike substances, which is adhesion.
7. If adhesive forces between a liquid and a container wall are strong, the liquid will tend to:
A.
Move away from the wall
B.
Stick to and spread along the wall
C.
Stop attracting the wall
D.
Turn into a solid at once
Correct Answer:
Stick to and spread along the wall
Explanation:
Strong adhesive forces attract the liquid toward the container wall and help it spread over the surface.
8. The attraction between mercury and glass is an example of:
A.
Adhesion
B.
Evaporation
C.
Diffusion
D.
Compression
Correct Answer:
Adhesion
Explanation:
The attraction between mercury and glass involves two different substances and is therefore an adhesive force.
9. Which pair of materials demonstrates adhesive attraction?
A.
Water and water
B.
Mercury and mercury
C.
Water and glass
D.
Oil and oil
Correct Answer:
Water and glass
Explanation:
Adhesive attraction occurs between unlike materials, such as water and glass.
10. What does adhesion between a liquid and a solid surface help explain?
A.
The liquid sticking to the solid surface
B.
The motion of planets around the Sun
C.
The expansion of a gas on heating
D.
The formation of ions in a salt
Correct Answer:
The liquid sticking to the solid surface
Explanation:
Adhesive forces are responsible for the attraction that makes a liquid stick to a solid surface.
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