Free Kinetic Molecular Theory MCQs with Answers
122 Kinetic Molecular Theory MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Kinetic molecular theory explains gases as rapidly moving particles separated by large distances, with negligible volume and negligible intermolecular attraction in the ideal model. It relates temperature to average kinetic energy and explains gas pressure, Boyle's and Charles's laws, diffusion, effusion and the conditions under which real gases deviate from ideal behavior.
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122 questions · page 3 of 7
- A. I ONLY
- B. II ONLY
- C. I AND II ONLY
- D. II AND III ONLY
- E. I, II, III
Explanation: According to Kinetic Molecular Theory , there are no attractive forces between the molecules of a gas because the distance between them is…
Correct answer: I, II, III- A. CO2 and N2O
- B. CO2 and CO
- C. NO2 and CO2
- D. CO2 and N2O4
Explanation: According to Graham's Law, the rate of diffusion or effusion is inversely proportional to the square root of molar mass.
Correct answer: CO2 and N2O- A. Size of pinhole
- B. Pressure
- C. Temperature
- D. Molecular mass
- E. All of the above
Explanation: Effusion: When gas is confined to a container at higher pressure than in the surrounding atmosphere it will escape from a small hole that…
Correct answer: All of the above- A. Hole dimensions
- B. Infinite dimensions
- C. Slit like dimensions
- D. Molecular dimensions
Explanation: Effusion moves the gas molecules from one container to another through a tiny hole however only a single molecule of gas passes thus it is…
Correct answer: Molecular dimensions- A. 6 times
- B. 4 times
- C. one fourth
- D. one eighth
Explanation: Graham's law states that the rate of effusion or of diffusion of a gas is inversely proportional to the square root of its molecular…
Correct answer: 4 times- A. Their mean square speed decreases
- B. Number of collision between molecules and walls of container decreased
- C. The force of attraction between them increase
- D. Their size decreases
Explanation: Pressure is proportional to temperature if the number of particles and the volume of the container is constant.
Correct answer: Number of collision between molecules and walls of container decreased- A. Indefinite volume
- B. Indefinite shape
- C. Low density
- D. Strong interactions
Explanation: Strong interactions as gases have weak interactions since the particles move quickly in random motion and move far apart from each other…
Correct answer: Strong interactions- A. Lower
- B. Higher
- C. Equal to
- D. All of these options are correct
Explanation: Diffusion is the intermixing (movement) of molecules. When looking at diffusion you must look at two factors: forces of attraction and…
Correct answer: Lower- A. Liquids
- B. Solids
- C. Plasma
- D. Gases
Explanation: Solids have the highest density as they have the most molecules per cubic volume.
Correct answer: Solids- A. None of these
- B. Solids
- C. Gases
- D. Liquids
Explanation: Density is defined as the mass per unit volume of a substance. Solids have tightly packed particles, which means greater mass per unit…
Correct answer: Gases- A. Plasma
- B. Liquids
- C. Solids
- D. Gases
Explanation: Plasma has the weakest intermolecular forces since its particles are far apart.
Correct answer: Plasma- A. Plasma
- B. Gases
- C. Solids
- D. Liquids
Explanation: Solids have the strongest intermolecular forces out of these because their molecules are closely packed as possess vibrational energies…
Correct answer: Solids- A. All statements are correct
- B. Only (b) and (c)
- C. Only (a), (b) and (c)
- D. Only (a) and (b)
Explanation: According to the Kinetic Molecular Theory of gases, gas molecules are in constant random motion and exhibit elastic collisions.
Correct answer: All statements are correct- A. Atomic theory
- B. Potential molecular theory
- C. Kinetic molecular theory
- D. None of these
Explanation: Option A: Atomic theory explains the behavior and properties of matter in terms of discrete, indivisible units called atoms.
Correct answer: Kinetic molecular theory- A. Definite volume
- B. Strong intermolecular forces
- C. Smaller distance
- D. Constant motion
Explanation: The presence of the process of diffusion in liquids is due to the random movement of molecules or particles within the liquid.
Correct answer: Constant motion- A. Potential energy
- B. Kinetic energy
- C. Both A & B
- D. None of these
Explanation: liquids can be converted to solids by lowering their kinetic energy.When a liquid is cooled, its kinetic energy decreases, and the…
Correct answer: Kinetic energy- A. Solids
- B. Liquids
- C. Gases
- D. All of these
Explanation: Intermolecular forces are the forces of attraction between molecules. These forces play a significant role in determining the physical…
Correct answer: Gases- A. High
- B. Low
- C. Moderate
- D. Same
Explanation: Effusion is the movement of a gas through a small opening, such as a pinhole, into a region of lower pressure.
Correct answer: Low- A. Directly
- B. Inversely
- C. Equally
- D. Highly
Explanation: The rate of diffusion or effusion is inversely proportional to the square root of its density at constant temperature and pressure.
Correct answer: Inversely- A. Solids
- B. Liquids
- C. Gases
- D. All of these options are correct
Explanation: Option A: Properties of Solids:Solid has a fixed shape and a fixed volume.Solid cannot be compressed.Solids have a high density.Force of…
Correct answer: Gases