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Properties of Gases Test

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Properties of Gases Test

Chemistry 11 (SCH3U) Unit 5 – Gases and Atmospheric Chemistry Properties of Gases Test

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Question 1 of 28
1. Question
Category: K/U
2. Pressure is exerted
- a) in only one direction.
- b) only upwards.
- c) equally in all directions.
- d) from left to right.
- e) only downwards.
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Question 2 of 28
2. Question
Category: K/U
3. A pressure of 515 mmHg is equivalent to
- a) 0.0461 psi.
- b) 0.100 psi.
- c) 9.96 psi
- d) 21.7 psi.
- e) 26.626 psi.
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Question 3 of 28
3. Question
Category: K/U
4. Which of the following best describes a gas?
- a) It assumes the volume and shape of the container, and it has weak intermolecular attractions.
- b) It assumes the volume and shape of the container, and it has strong intermolecular attractions.
- c) It has a distinct shape and volume, and it has strong intermolecular attractions.
- d) It has a distinct volume and assumes the shape of the container, and it has moderate intermolecular forces.
- e) It has a distinct volume and assumes the shape of the container, but it lacks intermolecular attractions.
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Question 4 of 28
4. Question
Category: K/U
5. Which of the following assumptions are made by the Kinetic Molecular Theory of gases?

I. Gas molecules move randomly in all directions.
II. Gas molecules exhibit negligible intermolecular forces.
III. Gas molecules have negligible volume.
- a) I and II only
- b) I and III only
- c) I only
- d) II only
- e) I, II, and III
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Question 5 of 28
5. Question
Category: K/U
6. Which of the following represents the greatest pressure?
- a) 21 psi.
- b) 2.5 atm
- c) 200 kPa
- d) 790 torr
- e) 960 mmHg
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Question 6 of 28
6. Question
Category: K/U
7. Which of the following express standard atmospheric pressure?
- a) 125 kPa
- b) 100 atm
- c) 1.00 atm
- d) 96.7 kPa
- e) 10.0 atm
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Question 7 of 28
7. Question
Category: K/U
8. Identify the best choice that describes this statement: “The volume of a fixed amount of gas is directly proportional to its temperature.”
- a) Boyle's law
- b) Charles's law
- c) Gay-Lussac's law
- d) Kinetic Molecular Theory
- e) Avogadro's law
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Question 8 of 28
8. Question
Category: K/U
9. Which of the following statements is NOT true according to the Kinetic Molecular Theory of gases?
- a) Gas molecules occupy a negligible volume.
- b) Gas molecules have elastic collisions.
- c) Gas molecules do not interact with one another (no attraction).
- d) Gas molecules in the same container all have the same velocity.
- e) Gas molecules move in straight line paths until they hit the sides of the container, and then they are reflected back in a straight line pattern.
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Question 9 of 28
9. Question
Category: K/U
10. What term is used to describe the type of collision in which ideal gas particles do not lose energy?
- a) isokinetic
- b) isothermic
- c) inelastic
- d) elastic
- e) translational
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Question 10 of 28
10. Question
Category: K/U
11. Doubling the initial pressure while keeping the temperature constant causes the volume of a gas to go from 1000 mL to
- a) 2000 mL (doubled)
- b) 500 mL (halved)
- c) 1000 mL (constant)
- d) about 900 mL (slight decrease)
- e) 1100 mL (increase slightly)
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Question 11 of 28
11. Question
Category: K/U
12. If the pressure is kept constant, the volume of a given mass of gas varies
- a) inversely with the Celsius temperature.
- b) directly with the Celsius temperature.
- c) inversely with the absolute or Kelvin temperature.
- d) directly with the Absolute or Kelvin temperature.
- e) directly with any temperature unit.
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Question 12 of 28
12. Question
Category: T
13. Which of the following graphs represents the plot of volume versus temperature (in K) at constant pressure?

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- a) A
- b) B
- c) C
- d) D
- e) E
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Question 13 of 28
13. Question
Category: T
14. The pressure of helium in a 2.00 L container is 0.478 atm, What is the new pressure if the volume of the gas increases to 3.00 L? Assume that the temperature and the amount of gas are constant.
- a) 0.717 atm
- b) 0.318 atm
- c) 2.87 atm
- d) 3.14 atm
- e) 12.6 atm
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Question 14 of 28
14. Question
Category: T
15. What is 0 K equivalent to on the Celsius scale?
- a) -273.15 ºC
- b) 0 ºC
- c) 100 ºC
- d) 273.15 ºC
- e) 373.15 ºC
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Question 15 of 28
15. Question
Category: T
16. According to Boyle’s law, if temperature and amount of gas are constant, the volume of a gas is _________________ to its pressure.
- a) directly proportional
- b) indirectly proportional
- c) inversely proportional
- d) not related
- e) randomly related
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Question 16 of 28
16. Question
Category: T
17. The volume of a 2.5 L balloon at 21.0 ºC in creases by 10 percent of its volume when placed in a hot-water bath. What is the temperature of the hot-water bath?
- a) 5. 73 ºC
- b) 50.4 ºC
- c) 107 ºC
- d) 267 ºC
- e) 323 ºC
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Question 17 of 28
17. Question
Category: T
18. A sealed 4.0-L pickle jar is filled with O₂ gas by the downward displacement of water. The jar is placed into the refrigerator. What will happen to the O₂ gas?
- a) The O2 molecules will move farther apart.
- b) The gas will liquefy.
- c) The O2 molecules will collide more frequently with the sides of the jar.
- d) The translational motion of the O2 molecules will increase.
- e) The kinetic energy of the O2 molecules will be reduced.
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Question 18 of 28
18. Question
Category: T
19. A sample of a gas with a volume of 1 L at 25ºC and a pressure of 101.325 kPa is subjected to an increase in pressure and a decrease in temperature. The volume of the gas will
- a) increase.
- b) remain the same.
- c) decrease.
- d) become zero.
- e) either increase or decrease depending on the magnitude of the pressure and temperature changes.
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Question 19 of 28
19. Question
Category: T
20. Laughing gas, N₂O, and tear gas, NH₃, are released at the same time at an equal distance away from you. Particles of laughing gas and tear gas move by simple diffusion and each molecule has the same kinetic energy. The room is perfectly sealed with no prevalent air current. Would you laugh or cry first?

Kinetic energy = ½mn²where m = mass and n = velocity)
- a) You would laugh first.
- b) You would cry first.
- c) You would laugh and cry at the same time.
- d) You would do neither because the gases would neutralize each other before reaching you.
- e) This is impossible to determine because too many variables are not controlled.
Correct
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Hint
The heavier a gas is, the slower it diffuses, Conversely, the lighter a gas is, the faster it diffuses.
Question 20 of 28
20. Question
Category: T
21. An ideal gas has a volume of 1.00 L at STP. What will happen to the volume of the same gas if the pressure is tripled and the absolute temperature is doubled?
- a) V2 = 0.25 L
- b) V2 = 0.667 L
- c) V2 = 1.33 L
- d) V2 = V1
- e) V2 = 6V1
Correct
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Question 21 of 28
21. Question
Category: T
22. Which of the following is NOT an observed property of gases?
- a) Gases are compressible and can liquefy under pressure.
- b) Gases have variable shape and volume.
- c) Gases expand to fill their container.
- d) Gases have a density greater than 1.00 g/mol.
- e) Gases diffuse and are completely miscible.
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Question 22 of 28
22. Question
Category: T
23. A balloon at the top of Mount Logan occupies a volume (V₁) of 775 mL at a temperature of 228 °C (T₁) and a pressure of 92.5 kPa (P₁). What is the pressure (P₂) at the bottom of the mountain if the same balloon has a volume (V₂) of 825 mL at a temperature (T₂) of 15 °C?
- a) 73.9 kPa
- b) 102 kPa
- c) 46 kPa
- d) – 46 kPa
- e) – 73 kPa
Correct
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Question 23 of 28
23. Question
Category: C
24. What are the three types of motion for particles?
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Question 24 of 28
24. Question
Category: C
25. What does the acronym KMT stand for?
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Question 25 of 28
25. Question
Category: C
26. Use the kinetic molecular theory to explain why the pressure increases in a tire when it has been driven for a long period of time on a hot afternoon.
Correct
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Question 26 of 28
26. Question
Category: C
27. Complete the following chart, assuming that the initial conditions were taken at SATP:
P₁ V₁ T₁ P₂ V₂ T₂
{ } { } { } 125 kPa 15.5 L 375 K
- , ,
Correct
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Question 27 of 28
27. Question
Category: A
28. Determine the volume of a balloon at STP assuming that it occupies a volume of 7.75 L at a temperature of 0ºC and a pressure of 125 kPa. You must show your work to get full credit!
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Question 28 of 28
28. Question
Category: A
29. What is the initial pressure of a gas if it occupied a volume of 375 mL, but now occupies a volume of 1.25 L at a pressure of 95.5 kPa? Assume that the temperature remains constant throughout the process.
Correct
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