Gases: Interactive Learning Quizzes for Chemistry Students

Question 1

Which factor does NOT influence the pressure of a gas?

Accepted Answer

Mass

Answer

Temperature

Answer

Volume

Answer

Number of moles

Question 2

According to Boyle's law, the volume of a gas at a constant temperature varies:

Accepted Answer

Inversely with its pressure

Answer

Directly with its pressure

Answer

In proportion to the square of its pressure

Answer

Independently of its pressure

Question 3

Charles's law describes the relationship between the volume and temperature of a gas at constant pressure. According to this law, the volume of a gas:

Accepted Answer

Is directly proportional to its absolute temperature

Answer

Is inversely proportional to its absolute temperature

Answer

Increases as the temperature decreases

Answer

Remains constant regardless of temperature

Question 4

A gas sample initially occupies 2.0 liters at 25°C and 1 atm. If the temperature is raised to 50°C and the pressure is increased to 2 atm, what will be the new volume of the gas?

Accepted Answer

4.0 L

Answer

1.0 L

Answer

2.0 L

Answer

8.0 L

Question 5

Which of the following gases exhibits significant deviations from ideal behavior at room temperature?

Accepted Answer

Carbon dioxide

Answer

Nitrogen

Answer

Oxygen

Answer

Helium

Question 6

According to Boyle's Law, what is the relationship between the pressure and volume of a gas?

Accepted Answer

They are inversely proportional.

Answer

They are directly proportional.

Answer

They are not related.

Answer

They are proportionally related under some conditions.

Question 7

What happens to the volume of a gas when the temperature increases and the pressure remains constant?

Accepted Answer

It increases.

Answer

It decreases.

Answer

It stays the same.

Answer

It doubles.

Question 8

Which of the following is the correct mathematical expression for the Ideal Gas Law?

Accepted Answer

PV = nRT

Answer

PV = NRT

Answer

V = nRT

Answer

P = nRT

Question 9

Which of the following is a key assumption of the Kinetic Molecular Theory of Gases?

Accepted Answer

Gas particles are in constant motion.

Answer

Gas particles have no volume.

Answer

Gas particles are arranged in a regular pattern.

Answer

Gas particles are attracted to each other.

Question 10

According to Boyle's law, the relationship between the pressure and volume of a gas is that they are:

Accepted Answer

Inversely proportional

Answer

Directly proportional

Answer

Unrelated

Answer

Proportional to the temperature

Question 11

Charles's law states that the volume of a gas at constant pressure is:

Accepted Answer

Directly proportional to its temperature

Answer

Inversely proportional to its temperature

Answer

Not related to its temperature

Answer

Proportional to the number of moles

Question 12

The ideal gas law equation, PV = nRT, relates the pressure (P), volume (V), temperature (T), and number of moles (n) of a gas. The constant R in this equation is:

Accepted Answer

The universal gas constant

Answer

The gas constant

Answer

The molar gas constant

Answer

The ideal gas constant

Question 13

A gas sample with a volume of 2.0 L and a pressure of 1.5 atm undergoes a change in pressure to 3.0 atm while the temperature remains constant. What is its new volume?

Accepted Answer

1.0 L

Answer

1.5 L

Answer

2.0 L

Answer

3.0 L

Question 14

Which of the following gases deviates most significantly from ideal behavior at high pressures?

Accepted Answer

Carbon dioxide

Answer

Helium

Answer

Nitrogen

Answer

Hydrogen

Question 15

According to the root mean square (rms) velocity equation, the average velocity of gas molecules is:

Accepted Answer

Proportional to the square root of the temperature

Answer

inversely proportional to the square root of the temperature

Answer

Proportional to the pressure

Answer

Independent of temperature

Question 16

The process in which a gas changes directly from a solid to a gas without passing through the liquid phase is called:

Accepted Answer

Sublimation

Answer

Evaporation

Answer

Condensation

Answer

Deposition

Question 17

Which factor is directly proportional to the average kinetic energy of gas molecules, according to the kinetic molecular theory of gases?

Accepted Answer

Temperature

Answer

Volume

Answer

Pressure

Answer

Number of moles

Question 18

According to Boyle's law, which variables are inversely related?

Accepted Answer

Pressure and volume

Answer

Volume and number of moles

Answer

Pressure and temperature

Answer

Temperature and volume

Question 19

Charles's law describes the relationship between which two variables?

Accepted Answer

Volume and temperature

Answer

Volume and number of moles

Answer

Pressure and temperature

Answer

Pressure and volume

Question 20

The ideal gas law is a combination of which gas laws?

Accepted Answer

Boyle's law, Charles's law, and Avogadro's law

Answer

Boyle's law and Charles's law only

Answer

Avogadro's law and Henry's law

Answer

Boyle's law and Dalton's law

Question 21

Which gas has the highest rate of diffusion among the following?

Accepted Answer

Helium

Answer

Neon

Answer

Nitrogen

Answer

Argon

Question 22

How can Graham's law of effusion be used to separate isotopes of an element with different molar masses?

Accepted Answer

Lighter isotopes effuse faster, allowing for separation through selective effusion.

Answer

Isotopes of the same element have different molar masses, so Graham's law cannot be used to separate them.

Answer

Heavier isotopes effuse faster, allowing for their separation.

Question 23

Which of the following factors does NOT affect the pressure of a gas?

Accepted Answer

Shape of container

Answer

Temperature

Answer

Volume

Answer

Number of moles

Question 24

According to Boyle's law, the volume of a gas at constant temperature is:

Accepted Answer

inversely proportional to its pressure

Answer

quadratically related to its pressure

Answer

directly proportional to its temperature

Answer

independent of its pressure

Question 25

Charles's law describes the relationship between the volume and temperature of a gas at constant pressure. According to this law, the volume of a gas:

Accepted Answer

increases linearly with increasing temperature

Answer

remains constant with changing temperature

Answer

decreases linearly with increasing temperature

Answer

increases quadratically with increasing temperature

Question 26

The ideal gas law combines the principles of which two other gas laws?

Accepted Answer

Boyle's law and Charles's law

Answer

Charles's law and Dalton's law

Answer

Boyle's law and Avogadro's law

Answer

Avogadro's law and Graham's law

Question 27

A gas sample has a volume of 3.0 L at a pressure of 15 atm. If the volume is increased to 6.0 L at constant temperature, what will be the new pressure?

Accepted Answer

7.5 atm

Answer

15 atm

Answer

30 atm

Question 28

The root mean square velocity of gas molecules is proportional to:

Accepted Answer

The square root of the absolute temperature

Answer

The pressure

Answer

The volume

Answer

The number of moles

Question 29

Which of the following gases has the lowest rate of diffusion?

Accepted Answer

Xenon

Answer

Nitrogen

Answer

Helium

Question 30

According to Boyle's law, what happens to the volume of a gas if its pressure is doubled at constant temperature?

Accepted Answer

It halves.

Answer

It triples.

Answer

It quadruples.

Answer

It remains constant.

Question 31

Charles's law states that the volume of a gas at constant pressure varies directly with its...

Accepted Answer

Absolute temperature.

Answer

Density.

Answer

Number of moles.

Answer

Mass.

Question 32

The ideal gas law is a combination of...

Accepted Answer

Boyle's law, Charles's law, and Avogadro's law.

Answer

Boyle's law and Charles's law only.

Answer

Boyle's law, Avogadro's law, and Graham's law.

Answer

Charles's law and Avogadro's law only.

Question 33

Which of the following gases has the highest average kinetic energy at a given temperature?

Accepted Answer

Helium

Answer

Carbon dioxide

Answer

Nitrogen

Answer

Sulfur dioxide

Question 34

Graham's law of effusion states that the rate of effusion of a gas is inversely proportional to its...

Accepted Answer

Molar mass.

Answer

Temperature

Answer

Volume

Answer

Density

Question 35

Which of the following factors does NOT affect the rate of a gas reaction?

Accepted Answer

Surface area of the reactants

Answer

Concentration of the reactants

Answer

Nature of the reactants

Answer

Temperature

Question 36

What is the equilibrium constant expression for the following reaction: A + B <=> C + D

Accepted Answer

Kc = [C][D]/[A][B]

Answer

Kc = ([A] - [B])/([C] - [D])

Answer

Kc = ([C] + [D])/([A] + [B])

Answer

Kc = [A][B]/[C][D]

Question 37

Which of the following statements about gases is true?

Accepted Answer

Gases have no definite shape or volume.

Answer

Gases have a definite shape but no definite volume.

Answer

Gases have a definite volume but no definite shape.

Answer

Gases have both a definite shape and a definite volume.

Question 38

A sample of gas at constant temperature is compressed to half its original volume. What happens to the pressure of the gas?

Accepted Answer

The pressure doubles.

Answer

The pressure remains the same.

Answer

The pressure halves.

Answer

The pressure increases by a factor of four.

Question 39

A balloon filled with helium is heated. What happens to the volume of the balloon?

Accepted Answer

The volume increases.

Answer

The volume decreases.

Answer

The volume remains the same.

Answer

The volume first increases then decreases.

Question 40

Which of the following is NOT a characteristic of an ideal gas?

Accepted Answer

The gas molecules have significant intermolecular forces.

Answer

The gas molecules are in constant random motion.

Answer

The gas molecules have negligible volume compared to the container volume.

Question 41

A container holds 2.0 moles of nitrogen gas at 25°C and 1 atm pressure. What is the volume of the container (in liters)? (R = 0.0821 L·atm/mol·K)

Accepted Answer

49.3 L

Answer

12.2 L

Answer

98.6 L

Answer

24.5 L

Question 42

A sample of gas is collected over water at 25°C. The total pressure of the gas mixture is 760 mmHg. The vapor pressure of water at 25°C is 23.8 mmHg. What is the pressure of the dry gas?

Accepted Answer

736.2 mmHg

Answer

783.8 mmHg

Answer

760 mmHg

Question 43

Which of the following gases would diffuse the fastest at a given temperature?

Accepted Answer

Helium (He)

Answer

Oxygen (O2)

Answer

Nitrogen (N2)

Answer

Carbon dioxide (CO2)

Question 44

A sample of gas at constant volume is heated from 273 K to 546 K. What happens to the pressure of the gas?

Accepted Answer

The pressure doubles.

Answer

The pressure increases by a factor of four.

Answer

The pressure remains the same.

Answer

The pressure halves.

Question 45

Which of the following statements is TRUE about the kinetic molecular theory of gases?

Accepted Answer

Gas molecules are in constant random motion.

Answer

The volume of gas molecules is significant compared to the container volume.

Answer

Gas molecules have significant intermolecular forces.

Question 46

A sample of gas occupies 5.0 L at 25°C and 1.0 atm. What volume will it occupy at 50°C and 1.0 atm?

Accepted Answer

5.4 L

Answer

2.5 L

Answer

10.0 L

Answer

5.0 L

Question 47

Which of the following statements best describes the relationship between pressure and volume of a gas at constant temperature?

Accepted Answer

Pressure and volume are inversely proportional.

Answer

Pressure is twice the volume.

Answer

Pressure is independent of volume.

Answer

Pressure and volume are directly proportional.

Question 48

What is the pressure exerted by 0.50 mol of an ideal gas in a 2.0 L container at 27°C?

Accepted Answer

6.2 atm

Answer

1.1 atm

Answer

12.4 atm

Answer

2.5 atm

Question 49

Which of the following is NOT an assumption of the kinetic molecular theory of gases?

Accepted Answer

Gas particles have strong attractive forces between them.

Answer

The volume of gas particles is negligible compared to the volume they occupy.

Answer

Gas particles are in constant random motion.

Question 50

A mixture of gases contains 0.20 mol of oxygen, 0.30 mol of nitrogen, and 0.50 mol of carbon dioxide. If the total pressure is 2.0 atm, what is the partial pressure of nitrogen?

Accepted Answer

0.60 atm

Answer

1.0 atm

Answer

1.4 atm

Answer

0.40 atm

Question 51

Which of the following gases is expected to deviate most from ideal behavior at high pressure and low temperature?

Accepted Answer

Ammonia (NH3)

Answer

Helium (He)

Answer

Hydrogen (H2)

Answer

Nitrogen (N2)

Question 52

A gas occupies 2.0 L at 25°C. What temperature is required to increase the volume to 4.0 L at constant pressure?

Accepted Answer

323 K

Answer

596 K

Answer

122 K

Answer

298 K

Question 53

A gas sample is collected over water at 25°C and a total pressure of 1.00 atm. If the vapor pressure of water at 25°C is 0.03 atm, what is the partial pressure of the collected gas?

Accepted Answer

0.97 atm

Answer

1.00 atm

Answer

0.94 atm

Answer

1.03 atm

Question 54

What is the density of oxygen gas (O2) at STP?

Accepted Answer

1.43 g/L

Answer

0.045 g/L

Answer

0.71 g/L

Answer

32.0 g/L

Question 55

Which of the following gas laws states that the volume of a gas is directly proportional to its absolute temperature at constant pressure?

Accepted Answer

Charles's law

Answer

Dalton's law

Answer

Avogadro's law

Answer

Boyle's law