Questions on Condensation
20 Multiple-Choice Questions: Condensation
Questions:
1. What is condensation?
A) Liquid to solid transition
B) Solid to gas transition
C) Gas to liquid transition
D) Liquid to gas transition
E) Solid to liquid transition
2. Which of the following is an example of condensation?
A) Snow melting
B) Water boiling
C) Fog forming
D) Ice subliming
E) Glass breaking
3. In which of the following conditions does condensation typically occur?
A) High temperature and low pressure
B) Low temperature and low humidity
C) Low temperature and high humidity
D) High temperature and high humidity
E) Extremely low pressure only
4. Which phase change is the opposite of condensation?
A) Melting
B) Boiling
C) Freezing
D) Deposition
E) Sublimation
5. What happens to the energy of gas particles during condensation?
A) It increases
B) It stays the same
C) It disappears
D) It is absorbed
E) It is released
6. Dew forming on grass in the morning is an example of:
A) Evaporation
B) Freezing
C) Melting
D) Condensation
E) Boiling
7. What must happen to a gas for condensation to occur?
A) It must be heated
B) Its temperature must increase
C) Its pressure must decrease
D) It must be cooled
E) It must become solid
8. Which of these appliances relies on condensation to function?
A) Oven
B) Air conditioner
C) Microwave
D) Blender
E) Toaster
9. Condensation is an example of what type of process?
A) Endothermic
B) Exothermic
C) Combustion
D) Sublimation
E) Neutral
10. Which particle behavior best describes condensation?
A) Particles gain kinetic energy
B) Particles break bonds
C) Particles escape the surface
D) Particles lose energy and move closer
E) Particles increase their velocity
11. In the water cycle, condensation leads to the formation of:
A) Rivers
B) Glaciers
C) Clouds
D) Oceans
E) Earthquakes
12. What instrument is commonly used to observe condensation in the atmosphere?
A) Thermometer
B) Barometer
C) Hygrometer
D) Rain gauge
E) Microscope
13. What is dew point?
A) The highest temperature at which evaporation can occur
B) The temperature at which air becomes saturated and condensation begins
C) The point at which water freezes
D) The temperature of boiling water
E) A measure of air pressure
14. Which of these is not a product of condensation?
A) Fog
B) Clouds
C) Dew
D) Steam
E) Water droplets on glass
15. What role does surface temperature play in condensation?
A) No role
B) Must be the same as air temperature
C) Must be higher than air temperature
D) Must be lower than dew point
E) Must be above freezing
16. Why does water form on the outside of a cold glass?
A) Because water leaks from the glass
B) Because the glass is sweating
C) Because water vapor condenses on the cold surface
D) Because the glass heats the air
E) Because of capillary action
17. Which gas condenses first when air is cooled?
A) Oxygen
B) Nitrogen
C) Argon
D) Water vapor
E) Carbon dioxide
18. When condensation occurs, what happens to the air's relative humidity?
A) It increases
B) It decreases
C) It becomes 100%
D) It becomes 0%
E) It stays the same
19. What is the main difference between condensation and precipitation?
A) Condensation occurs in oceans
B) Precipitation creates clouds
C) Condensation is a phase change, precipitation is falling water
D) They are the same
E) Condensation is a chemical reaction
20. Which of these contributes most to condensation on a mirror after a hot shower?
A) Cold air
B) Humid air
C) Low pressure
D) Salt in water
E) Wind flow
- Questions on Classes of Crystalline Solids
- Questions on Amorphous Solids
- Questions on Change of State of Matter
Extended Answers and Explanations
1. C) Gas to liquid transition
→ Condensation is the process by which a gas becomes a liquid.
2. C) Fog forming
→ Fog forms when water vapor condenses into tiny water droplets in the air.
3. C) Low temperature and high humidity
→ These conditions are ideal for condensation, especially when air cools to its dew point.
4. B) Boiling
→ Boiling (or vaporization) is the reverse of condensation.
5. E) It is released
→ Condensation is an exothermic process where gas releases energy as it condenses.
6. D) Condensation
→ Dew is formed by water vapor condensing on cool surfaces like grass.
7. D) It must be cooled
→ Lowering temperature causes gas particles to lose energy and condense.
8. B) Air conditioner
→ Air conditioners cool warm air, causing moisture in the air to condense.
9. B) Exothermic
→ Heat is released during condensation.
10. D) Particles lose energy and move closer
→ In condensation, gas particles slow down and come together to form a liquid.
11. C) Clouds
→ Clouds are formed by water vapor condensing into tiny droplets in the atmosphere.
12. C) Hygrometer
→ Hygrometers measure humidity and can help indicate when condensation will occur.
13. B) The temperature at which air becomes saturated and condensation begins
→ Dew point is critical for predicting condensation.
14. D) Steam
→ Steam is vapor, not a product of condensation.
15. D) Must be lower than dew point
→ Surfaces cooler than the dew point cause water vapor to condense on them.
16. C) Because water vapor condenses on the cold surface
→ Warm air touches the cold glass, and moisture condenses into droplets.
17. D) Water vapor
→ Among the gases in air, water vapor condenses first as it has a higher condensation temperature.
18. C) It becomes 100%
→ Relative humidity reaches 100% when condensation begins.
19. C) Condensation is a phase change, precipitation is falling water
→ Condensation forms droplets; precipitation is when they fall to the ground.
20. B) Humid air
→ Moist air in a bathroom hits the cooler mirror surface, causing condensation.
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