Ideal Gas Law: Interactive Quizzes and Practice Questions

Question 1

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

Accepted Answer

directly proportional to the pressure

Answer

inversely proportional to the pressure

Answer

independent of the pressure

Answer

directly proportional to the square of the pressure

Question 2

The ideal gas law combines Boyle's law and Charles's law to give the relationship:

Accepted Answer

PV = nRT

Answer

PV/T = constant

Answer

V/T = constant

Answer

P/V = constant

Question 3

Which of the following gases has the highest rate of effusion at a given temperature?

Accepted Answer

Helium

Answer

Nitrogen

Answer

Oxygen

Answer

Carbon dioxide

Question 4

The root mean square (rms) speed of molecules in a gas is:

Accepted Answer

proportional to the square root of the temperature

Answer

proportional to the square of the temperature

Answer

inversely proportional to the temperature

Answer

independent of the temperature

Question 5

The pressure-volume relationship of an ideal gas at constant temperature is known as:

Accepted Answer

Boyle's law

Answer

Charles's law

Answer

Avogadro's law

Answer

Dalton's law

Question 6

Which of the following gases deviates significantly from ideal behavior under normal conditions?

Accepted Answer

Ammonia (NH₃)

Answer

Helium (He)

Answer

Nitrogen (N₂)

Answer

Hydrogen (H₂)

Question 7

The density of an ideal gas at constant volume is directly proportional to its:

Accepted Answer

Pressure

Answer

Temperature

Answer

Moles of gas

Answer

Volume

Question 8

As a helium balloon filled with gas rises in the atmosphere, what happens to the gas pressure inside?

Accepted Answer

Decreases

Answer

Increases

Answer

Remains the same

Answer

Fluctuates

Question 9

Which gas process involves a decrease in both temperature and volume?

Accepted Answer

Isochoric cooling

Answer

Isothermal expansion

Answer

Adiabatic compression

Answer

Isobaric heating

Question 10

According to the kinetic molecular theory, the average kinetic energy of gas molecules is:

Accepted Answer

Directly proportional to temperature

Answer

Inversely proportional to temperature

Answer

Equal for all gases at the same temperature

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Independent of temperature

Question 11

Which of the following statements about Boyle's law is correct?

Accepted Answer

The volume of a gas is inversely proportional to its pressure at constant temperature.

Answer

Boyle's law applies to both ideal and non-ideal gases.

Answer

The pressure of a gas is directly proportional to its volume at constant temperature.

Answer

Boyle's law describes the behavior of gases at varying temperatures.

Question 12

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

Accepted Answer

Directly proportional

Answer

Inversely proportional

Answer

Independent

Answer

Equal

Question 13

Which two laws are combined to form the Ideal Gas Law?

Accepted Answer

Boyle's law and Charles's law

Answer

Boyle's law and Avogadro's law

Answer

Charles's law and Gay-Lussac's law

Answer

Avogadro's law and Gay-Lussac's law

Question 14

The molar mass of a gas represents:

Accepted Answer

The mass of one mole of the gas.

Answer

The mass of one atom of the gas.

Answer

The mass of one molecule of the gas.

Answer

The mass of one liter of the gas.

Question 15

Which of the following conditions is NOT applicable to an ideal gas?

Accepted Answer

The particles are closely packed, with negligible spacing between them.

Answer

The particles have negligible intermolecular forces.

Answer

The particles are in perpetual random motion.

Answer

The particles obey the laws of classical mechanics.

Question 16

Which two gas laws are combined to form the Ideal Gas Law?

Accepted Answer

Boyle's law and Charles's law

Answer

Boyle's law and Avogadro's law

Answer

Charles's law and Gay-Lussac's law

Answer

Avogadro's law and Gay-Lussac's law

Question 17

How is the average kinetic energy of gas molecules related to temperature?

Accepted Answer

Directly proportional

Answer

Inversely proportional

Answer

Not related

Answer

Linearly related

Question 18

Of the following gases, which has the highest density?

Accepted Answer

Carbon dioxide (CO2)

Answer

Hydrogen (H2)

Answer

Nitrogen (N2)

Answer

Oxygen (O2)

Question 19

In the Ideal Gas Law, the standard unit for measuring pressure is the:

Accepted Answer

Pascal

Answer

Kelvin

Answer

Liter

Answer

Mole

Question 20

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

Accepted Answer

Mass

Answer

Volume

Answer

Temperature

Answer

Pressure

Question 21

The mathematical expression for the Ideal Gas Law is:

Accepted Answer

PV = nRT

Answer

V/T = constant

Answer

P/V = constant

Answer

n/T = constant

Question 22

In a mixture of hydrogen, helium, and oxygen gases at a given temperature, which gas will have the highest average kinetic energy?

Accepted Answer

Hydrogen

Answer

Helium

Answer

Oxygen

Answer

All of the gases have the same kinetic energy

Question 23

A gas mixture contains 2 moles of nitrogen, 3 moles of oxygen, and 1 mole of argon. If the total pressure is 5 atm, what is the partial pressure of nitrogen in the mixture?

Accepted Answer

1.5 atm

Answer

1 atm

Answer

2 atm

Answer

2.5 atm

Question 24

The Ideal Gas Law relates which three properties of a gas?

Accepted Answer

Pressure, volume, and temperature

Answer

Pressure, volume, and mass

Answer

Volume, temperature, and mass

Answer

Temperature, pressure, and mass

Question 25

A gas sample has a volume of 2.0 L at 25 °C. What volume will it occupy at 50 °C, assuming constant pressure?

Accepted Answer

3.0 L

Answer

1.0 L

Answer

2.0 L

Answer

4.0 L

Question 26

If the pressure of a gas is doubled, what happens to its volume (assuming constant temperature)?

Accepted Answer

Halves

Answer

Doubles

Answer

Increases by a factor of 4

Answer

Remains unchanged

Question 27

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

Accepted Answer

Gas particles interact strongly with each other

Answer

Gas particles have negligible volume

Answer

Gas particles collide elastically

Answer

Gas particles are in constant random motion

Question 28

What is the molar volume of an ideal gas at Standard Temperature and Pressure (STP)?

Accepted Answer

22.4 L/mol

Answer

44.8 L/mol

Answer

89.6 L/mol

Answer

179.2 L/mol

Question 29

Which of the following gases deviates significantly from ideal behavior at low temperatures?

Accepted Answer

Carbon dioxide

Answer

Hydrogen

Answer

Helium

Answer

Nitrogen

Question 30

The compressibility factor (Z) for an ideal gas is always:

Accepted Answer

1

Answer

0

Answer

2

Answer

3

Question 31

Which factor does NOT affect the pressure of an ideal gas?

Accepted Answer

Shape of the container

Answer

Temperature

Answer

Volume

Answer

Number of moles present

Question 32

A sample of helium gas occupies 2.5 L at 298 K. If the temperature is raised to 373 K while the pressure remains constant, what will be the new volume of the gas?

Accepted Answer

3.1 L

Answer

1.9 L

Answer

2.5 L

Answer

3.7 L

Question 33

A mixture of ideal gases, A and B, has a total pressure of 1.2 atm. If the partial pressure of gas A is 0.7 atm, what is the partial pressure of gas B?

Accepted Answer

0.5 atm

Answer

0.7 atm

Answer

1.2 atm

Answer

1.7 atm

Question 34

Which statement below is NOT an assumption of the Ideal Gas Law?

Accepted Answer

Gas particles interact with each other.

Answer

The average kinetic energy of gas particles is proportional to the absolute temperature.

Answer

Gas particles move randomly.

Answer

The volume of gas particles is negligible compared to the volume of the container.

Question 35

A gas sample occupies a volume of 3.0 dm³ at a pressure of 120 kPa. If the pressure is increased to 240 kPa and the temperature remains constant, what will be the new volume of the gas?

Accepted Answer

1.5 dm³

Answer

3.0 dm³

Answer

0.75 dm³

Question 36

A balloon filled with helium gas has a volume of 6.0 L at 20 °C. If the balloon is heated to 60 °C while the pressure remains constant, what will be the new volume of the balloon?

Accepted Answer

7.2 L

Answer

6.0 L

Answer

3.0 L

Question 37

A scuba diver inhales a mixture of gases containing 25% oxygen, 60% nitrogen, and 15% helium. If the total pressure of the gas mixture is 3.0 atm, what is the partial pressure of oxygen?

Accepted Answer

0.75 atm

Answer

3.0 atm

Answer

0.25 atm

Answer

1.5 atm

Question 38

A mixture of hydrogen and oxygen gases has a mass ratio of 1:8. What is the mole ratio of hydrogen to oxygen in the mixture?

Accepted Answer

1:4

Answer

1:1

Answer

1:2

Question 39

Which statement below is NOT a valid assumption of the Ideal Gas Law?

Accepted Answer

Gas particles have a significant volume.

Answer

Collisions between gas particles are perfectly elastic.

Answer

Gas particles are in constant random motion.

Answer

The average kinetic energy of gas particles is proportional to the absolute temperature.

Question 40

Which of the following factors does NOT directly influence the pressure of a confined gas sample?

Accepted Answer

Mass of the gas

Answer

Temperature of the gas

Answer

Number of moles of gas

Answer

Volume of the gas

Question 41

State the equation for the Ideal Gas Law.

Accepted Answer

PV = nRT

Answer

PV = n^2RT

Answer

PV = n^3T

Answer

PV = RT^2

Question 42

Which unit is used to express the quantity of gas in the Ideal Gas Law?

Accepted Answer

Mole

Answer

Kelvin

Answer

Gram

Answer

Liter

Question 43

Which factor does NOT influence the behavior of an ideal gas?

Accepted Answer

Chemical reactions

Answer

Temperature

Answer

Pressure

Question 44

A sample of gas has a volume of 5.0 L at 1.0 atm. What volume will the gas occupy at 2.0 atm, assuming constant temperature?

Accepted Answer

2.5 L

Answer

8.0 L

Answer

4.0 L

Answer

6.0 L

Question 45

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

Accepted Answer

Mass

Answer

Pressure

Answer

Volume

Answer

Temperature

Question 46

To calculate the pressure of a gas using the Ideal Gas Law, which two other variables must be known?

Accepted Answer

Volume and Temperature

Answer

Temperature and number of molecules

Answer

Volume and mass

Answer

Mass and temperature

Question 47

Which assumption in the Ideal Gas Law states that gas particles possess negligible volume?

Accepted Answer

Gas particles have negligible volume

Answer

Gas particles interact strongly with each other

Answer

Gas particles have the same mass

Answer

Gas particles travel in straight lines

Question 48

To which type of gas does the Ideal Gas Law **strictly** apply?

Accepted Answer

Ideal gases

Answer

Liquids

Answer

All gases

Answer

Solids

Question 49

Under normal conditions, which real gas behaves most similarly to an ideal gas?

Accepted Answer

Helium

Answer

Carbon dioxide

Answer

Ammonia

Answer

Water vapor

Question 50

What is the molar volume of an ideal gas at Standard Temperature and Pressure (STP)?

Accepted Answer

22.4 L

Answer

33.6 L

Answer

44.8 L

Answer

11.2 L

Question 51

Which of the following is the SI unit of pressure?

Accepted Answer

Pascal

Answer

Second

Answer

Meter

Answer

Kilogram