Topic 6 – Effect of Temperature and Pressure on State

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🪨 Topic 6 – Effect of Temperature and Pressure on State Quiz

1. What happens to particles when temperature is increased?

A. They gain kinetic energy B. They become heavier C. They stick together D. They lose energy

2. What is the effect of high pressure on gases?

A. They expand B. They cool rapidly C. They gain mass D. They liquefy

3. Why are gases stored in cylinders under high pressure?

A. To keep them light B. To liquefy them C. To solidify them D. To burn easily

4. What happens to boiling point if external pressure is increased?

A. Decreases B. Remains same C. Increases D. Becomes zero

5. Which factor directly affects the speed of particle movement?

A. Temperature B. Color C. Pressure D. Size

6. How is carbon dioxide gas stored in cylinders?

A. Heating and increasing pressure B. Cooling only C. Reducing pressure D. Increasing pressure and cooling

7. Why does water boil at a lower temperature at higher altitudes?

A. Sunlight is stronger B. Water is pure C. Atmospheric pressure is lower D. Less gravity

8. How do temperature and pressure influence the state of matter?

A. Both decrease kinetic energy B. Temperature increases motion; pressure brings particles closer C. Both increase volume D. Both cool the matter

9. Which method can change gas into liquid?

A. Increase pressure, decrease temperature B. Increase both pressure and temperature C. Decrease both D. Increase volume only

10. Why does high pressure help in liquefying gases?

A. It adds energy to gas B. It breaks bonds C. It brings particles close D. It changes density

11. What effect does increasing temperature have on solids and liquids?

A. Freezes them B. Changes their state C. Decreases volume D. Lowers energy

12. What happens to a liquid when its temperature is decreased?

A. It freezes B. It evaporates C. It boils D. It sublimates

13. At what temperature does water boil at normal atmospheric pressure?

A. 50°C B. 75°C C. 100°C D. 120°C

14. Which pair of factors affect the state of a substance?

A. Volume and size B. Shape and mass C. Surface area and color D. Temperature and pressure

15. What happens to particle motion with increased temperature?

A. It increases B. It stops C. It becomes irregular D. It decreases

16. At which point does a solid turn into a liquid?

A. Boiling point B. Melting point C. Freezing point D. Sublimation point

17. What causes faster motion of particles in matter?

A. High density B. Low volume C. More mass D. Higher temperature

18. Why does water boil below 100°C on hills?

A. Water becomes lighter B. Sunlight is stronger C. Atmospheric pressure is lower D. Temperature is higher

19. What happens when we compress a gas?

A. It can change into liquid B. It evaporates C. It expands D. It breaks down

20. Which statement is true?

A. State of matter cannot change B. Changing pressure or temperature can change the state C. Pressure only changes color D. Temperature has no effect

21. Why are gases more compressible than solids?

A. They are heavier B. They have stronger bonds C. Particles are far apart D. They have higher density

22. What allows particles to break free from each other?

A. Pressure decrease B. Low mass C. More volume D. High temperature

23. How can a gas be converted into a liquid?

A. Cool it and compress B. Heat it and compress C. Increase volume D. Shake it

24. What is the process of converting gas into liquid using pressure called?

A. Evaporation B. Compression C. Expansion D. Sublimation

25. Why is CO₂ dissolved in cold drinks under pressure?

A. To increase acidity B. To sweeten it C. To add oxygen D. To make it fizzy

26. What happens to the density of a gas when pressure increases?

A. Decreases B. Remains same C. Increases D. Becomes zero

27. Which two factors determine whether a substance will melt or vaporize?

A. Color and density B. Temperature and pressure C. Taste and smell D. Shape and mass

28. How does low atmospheric pressure affect boiling point?

A. It lowers the boiling point B. It increases the boiling point C. No effect D. Freezes water

29. Which gas is commonly liquefied using cooling and compression?

A. Hydrogen B. Oxygen C. Nitrogen D. Ammonia

30. What is one benefit of applying pressure to gases?

A. It makes them lighter B. It adds oxygen C. It helps in storing gases in small volumes D. It makes them solid

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