Ideal Gas Law: Interactive Quizzes and Practice Questions

Question 1

Which of these factors does NOT influence the behavior of a gas?

Accepted Answer

Molecular density

Answer

Pressure

Answer

Temperature

Answer

Volume

Question 2

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

Accepted Answer

Halve

Answer

Double

Answer

Remain the same

Answer

Quadruple

Question 3

During an adiabatic expansion of an ideal gas, its temperature:

Accepted Answer

Decreases

Answer

Increases

Answer

Remains constant

Answer

Becomes zero

Question 4

Which of the following gases would have the lowest pressure at a given temperature and volume?

Accepted Answer

Helium

Answer

Neon

Answer

Nitrogen

Answer

Oxygen

Question 5

The Ideal Gas Law can be used to determine the:

Accepted Answer

Molecular weight of a gas

Answer

Number of atoms in a gas sample

Answer

Density of a gas

Answer

Electrical conductivity of a gas

Question 6

Which of the following conditions most closely approximates an ideal gas?

Accepted Answer

Low pressure and high temperature

Answer

High pressure and low temperature

Answer

High pressure and high temperature

Answer

Low pressure and low temperature

Question 7

According to the Ideal Gas Law, the product of pressure and volume is directly proportional to:

Accepted Answer

Temperature

Answer

Amount of gas

Answer

Density

Answer

Molar mass

Question 8

Which of the following would cause a gas to expand based on the Ideal Gas Law?

Accepted Answer

Increasing amount of gas

Answer

Increasing pressure

Answer

Decreasing temperature

Answer

Decreasing volume

Question 9

A gas occupies a volume of 200 cm³ at a pressure of 1 atm. What volume will the gas occupy if the pressure is increased to 2 atm assuming constant temperature?

Accepted Answer

400 cm³

Answer

100 cm³

Answer

200 cm³

Answer

800 cm³

Question 10

Which gas would have the largest volume under identical conditions of pressure and temperature?

Accepted Answer

Hydrogen

Answer

Oxygen

Answer

Nitrogen

Answer

Carbon dioxide

Question 11

Which of the following assumptions is NOT made in the Ideal Gas Law?

Accepted Answer

Gas particles obey the laws of classical physics

Answer

Gas particles have negligible volume

Answer

Gas particles do not interact

Answer

Gas particles move randomly

Question 12

Which real gas exhibits significant deviations from ideal behaviour at standard conditions?

Accepted Answer

Carbon dioxide

Answer

Helium

Answer

Neon

Answer

Water vapour

Question 13

In a sealed container with a mixture of oxygen and helium gases, which gas has a higher average kinetic energy at a given temperature?

Accepted Answer

They have the same average kinetic energy

Answer

Oxygen

Answer

Helium

Answer

Cannot be determined

Question 14

Which of the following conditions must be met for a gas to be considered ideal?

Accepted Answer

The gas particles have negligible volume and do not interact with each other.

Answer

The temperature of the gas is very high and the pressure is very low.

Answer

The gas is in a state of dynamic equilibrium.

Answer

The gas is contained in a rigid container.

Question 15

What is the difference between an isothermal process and an isobaric process?

Accepted Answer

In an isothermal process, temperature remains constant, while in an isobaric process, pressure remains constant.

Answer

In an isobaric process, temperature remains constant, while in an isothermal process, pressure remains constant.

Answer

There is no difference between isothermal and isobaric processes.

Answer

Isothermal processes involve heat transfer, while isobaric processes do not.

Question 16

What is the molar mass of a gas that has a density of 1.25 g/L at a temperature of 298 K and a pressure of 1.0 atm?

Accepted Answer

16 g/mol

Answer

32 g/mol

Answer

44 g/mol

Answer

64 g/mol

Question 17

Which of the following graphs represents the relationship between pressure and volume for an ideal gas at constant temperature?

Accepted Answer

A straight line with a positive slope

Answer

A straight line with a negative slope

Answer

A curve with a maximum

Answer

A curve with a minimum

Question 18

The Ideal Gas Law is mathematically expressed as:

Accepted Answer

PV = nRT

Answer

PV = NkT

Answer

PV = RT

Answer

PV = nT

Question 19

The standard molar volume of a gas at STP is approximately:

Accepted Answer

22.4 L

Answer

10 L

Answer

20 L

Answer

24 L

Question 20

A mixture of gases has a total pressure of 2 atm. If one of the gases has a partial pressure of 0.8 atm, what is the mole fraction of that gas in the mixture?

Accepted Answer

0.2

Answer

0.4

Answer

0.6

Answer

0.8

Question 21

Which of the following is a limitation of the Ideal Gas Law?

Accepted Answer

It does not apply to gases at very low pressures.

Answer

It accounts for intermolecular forces.

Answer

It assumes that gas particles are perfectly elastic.

Answer

It can be used to predict phase transitions.

Question 22

The Joule-Thomson coefficient, which describes the temperature change of a gas upon expansion, is:

Accepted Answer

Zero for an ideal gas.

Answer

Always positive.

Answer

Always negative.

Answer

Positive for some gases and negative for others.

Question 23

Which of the following is NOT an assumption of the Ideal Gas Law?

Accepted Answer

Gas particles have very low kinetic energy.

Answer

Gas particles have negligible volume.

Answer

Gas particles move randomly and independently.

Answer

Gas particles have no intermolecular forces.

Question 24

A mixture of gases has a partial pressure of nitrogen (N2) of 0.6 atm and a partial pressure of oxygen (O2) of 0.4 atm. What is the total pressure of the mixture?

Accepted Answer

1.4 atm

Answer

0.2 atm

Answer

1.0 atm

Answer

2.0 atm

Question 25

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

Accepted Answer

Volume

Answer

Molar mass

Answer

Temperature

Answer

Surface area

Question 26

Which of the following is the formula for the Ideal Gas Law?

Accepted Answer

PV = nRT

Answer

PV/T = nR

Answer

nT/V = P

Answer

RT/PV = n

Question 27

A gas has a temperature of 273 K. If the temperature is increased by 100 K, what is the new temperature in degrees Celsius?

Accepted Answer

373 °C

Answer

0 °C

Answer

273 °C

Answer

473 °C

Question 28

Which of the following gases has the highest molar mass?

Accepted Answer

Carbon dioxide

Answer

Hydrogen

Answer

Oxygen

Answer

Nitrogen

Question 29

What is the relationship between the pressure and volume of a gas at constant temperature?

Accepted Answer

Inversely proportional

Answer

Directly proportional

Answer

No relationship

Answer

Linear relationship

Question 30

What is the relationship between the pressure and temperature of a gas at constant volume?

Accepted Answer

Directly proportional

Answer

Inversely proportional

Answer

No relationship

Answer

Linear relationship

Question 31

Which of the following is NOT a variable in the Ideal Gas Law equation?

Accepted Answer

Mass

Answer

Pressure

Answer

Volume

Answer

Temperature

Question 32

The Ideal Gas Law equation is:

Accepted Answer

PV = nRT

Answer

V = nRT/P

Answer

T = PV/nR

Answer

P = nRT/V

Question 33

A gas has a volume of 2 liters at a pressure of 1 atmosphere. If the temperature is increased by a factor of 2, what is the new volume?

Accepted Answer

4 liters

Answer

1 liter

Answer

2 liters

Answer

8 liters

Question 34

Which of the following is a real gas that deviates significantly from ideal gas behavior at low temperatures?

Accepted Answer

Carbon dioxide

Answer

Oxygen

Answer

Nitrogen

Answer

Helium

Question 35

According to the Ideal Gas Law, which of the following is the pressure of a gas directly proportional to?

Accepted Answer

Temperature

Answer

Mass

Answer

Density

Answer

Volume

Question 36

Which of the following gases has the highest molar volume at Standard Temperature and Pressure (STP)?

Accepted Answer

Helium

Answer

Oxygen

Answer

Carbon dioxide

Answer

Nitrogen

Question 37

The Ideal Gas Law can be used to determine which of the following properties of a gas?

Accepted Answer

Density

Answer

Boiling point

Answer

Viscosity

Answer

Conductivity

Question 38

Which of the following is a practical application of the Ideal Gas Law in engineering?

Accepted Answer

Designing gas turbines

Answer

Predicting weather patterns

Answer

Studying nuclear reactions

Answer

Analyzing air pollution

Question 39

The Ideal Gas Law is an important tool in which academic fields?

Accepted Answer

Chemistry and physics

Answer

Economics only

Answer

Biology only

Answer

Geology only

Question 40

What is the relationship between the volume and temperature of a gas at constant pressure?

Accepted Answer

Directly proportional

Answer

Parabolic relationship

Answer

Inversely proportional

Answer

No relationship

Question 41

Which of the following gases would have the lowest rate of effusion?

Accepted Answer

Carbon dioxide (CO2)

Answer

Nitrogen (N2)

Answer

Oxygen (O2)

Answer

Helium (He)

Question 42

Which of the following assumptions is made in the Ideal Gas Law?

Accepted Answer

Gas particles behave independently

Answer

Gas particles are at rest

Answer

Gas particles have significant interactions

Answer

Gas particles have large volume

Question 43

What is the SI unit of pressure?

Accepted Answer

Pascal (Pa)

Answer

Liter per atmosphere (L/atm)

Answer

Centimeter of mercury (cmHg)

Answer

Pound per square inch (psi)

Question 44

Which of the following processes involves an increase in both pressure and volume?

Accepted Answer

Isothermal expansion

Answer

Adiabatic cooling

Answer

Isobaric cooling

Answer

Isochoric heating

Question 45

The Ideal Gas Law is represented by which equation?

Accepted Answer

PV = nRT

Answer

V/P = n/T

Answer

P/V = n/T

Answer

PV = RT/n

Question 46

A balloon filled with helium has a volume of 10.0 L at room temperature (298 K). If the temperature is raised to 373 K, what will be the new volume of the balloon?

Accepted Answer

12.5 L

Answer

8.3 L

Answer

18.7 L

Answer

15.0 L

Question 47

Which assumption is fundamental to the Ideal Gas Law?

Accepted Answer

Gas particles have negligible volume compared to the volume of the container.

Answer

Gas particles experience strong attractive forces.

Answer

Gas particles have constant velocity.

Answer

Gas particles move in straight lines without colliding.

Question 48

Which of the following equations represents the Ideal Gas Law?

Accepted Answer

PV = nRT

Answer

V = n(RT/P)

Answer

n = P(V/RT)

Answer

P = n(V/RT)

Question 49

A container has a gas sample of 1.0 mol at a temperature of 273 K and a pressure of 1.0 atm. What is the volume (in liters) of the gas sample?

Accepted Answer

22.4

Answer

33.6

Answer

11.2

Question 50

A mixture of gases contains 0.5 mol of hydrogen (H₂) and 1.0 mol of oxygen (O₂). If the total volume of the mixture is 20.0 L and the temperature is 298 K, what is the partial pressure (in atm) of hydrogen in the mixture?

Accepted Answer

0.5

Answer

1.0

Answer

2.0

Answer

1.5

Question 51

Which of the following gases has the lowest molar mass?

Accepted Answer

Helium

Answer

Oxygen

Answer

Nitrogen

Answer

Carbon dioxide

Question 52

At Standard Temperature and Pressure (STP), what is the molar volume (in L/mol) of an ideal gas?

Accepted Answer

22.4

Answer

33.6

Answer

44.8

Answer

11.2

Question 53

Which of the following gases is most likely to deviate significantly from ideal behavior at low temperatures and high pressures?

Accepted Answer

Carbon dioxide

Answer

Nitrogen

Answer

Helium

Answer

Oxygen