This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. At what temperature do nitrogen molecules move fastest? A) 350 K. B) 300 K. C) 250 K. D) 200 K. Show Answer Correct Answer: A) 350 K. 2. As gas particles increase, pressure A) Increases. B) Decreases. C) Doesn't change. D) None of the above. Show Answer Correct Answer: A) Increases. 3. What happens to the pressure of a gas if the volume of its container is decreased while the temperature remains constant? A) The pressure increases. B) The pressure decreases. C) The pressure remains constant. D) The pressure becomes zero. Show Answer Correct Answer: A) The pressure increases. 4. A sample of carbon-12 has a mass of 3.0 g. Which expression gives the number of atoms in the sample? (N$_{A}$$^{ }$ is the symbol for the Avogadro constant.) A) 0.0030 N$_{A}$. B) 0.25 N$_{A}$. C) 3 N$_{A}$. D) 4 N$_{A}$. Show Answer Correct Answer: B) 0.25 N$_{A}$. 5. Part of the Ideal Gas law states that all collisions are perfectly elastic, which means ..... A) The total kinetic energy remains the same. B) The particles gradually slow down over time. C) All the above. D) None of the above. Show Answer Correct Answer: A) The total kinetic energy remains the same. 6. How does pressure affect the particles in a liquid according to the kinetic theory? A) Increased pressure makes particles move faster. B) Increased pressure makes particles move slower. C) Increased pressure has no effect on particle movement. D) Increased pressure causes particles to ionize. Show Answer Correct Answer: A) Increased pressure makes particles move faster. 7. The positively charged particle that makes up the identity of an element is called what? A) Proton. B) Neutron. C) Electron. D) Positron. Show Answer Correct Answer: A) Proton. 8. Particles of liquids ..... A) Are free to flow around and past each other. B) Move fast in straight lines until they collide with each other or the container walls. C) Do not move at all. D) Vibrate in place. Show Answer Correct Answer: A) Are free to flow around and past each other. 9. Scientific unit for pressure A) Pascal. B) Pounds. C) Psi. D) MmHg. Show Answer Correct Answer: A) Pascal. 10. "Kinetic" refers to A) Motion. B) Heat. C) Density. D) Forces. Show Answer Correct Answer: A) Motion. 11. What is the significance of the root-mean-square speed in the kinetic theory of gases? A) It represents the average speed of gas molecules. B) It represents the maximum speed of gas molecules. C) It represents the minimum speed of gas molecules. D) It represents the speed of the fastest molecule. Show Answer Correct Answer: A) It represents the average speed of gas molecules. 12. How is the absolute scale of temperature measured? A) In degrees Fahrenheit. B) In degrees Celsius. C) In Kelvin. D) In Rankine. Show Answer Correct Answer: C) In Kelvin. 13. Gas laws involve what three variables? A) Solid Liquid Gas. B) Speed Velocity Acceleration. C) Elements Compounds Mixtures. D) Pressure Temperature Volume. Show Answer Correct Answer: D) Pressure Temperature Volume. 14. Gas particles have the ..... kinetic energy because they move the fastest. A) Least. B) Most. C) All the above. D) None of the above. Show Answer Correct Answer: B) Most. 15. What happens to the energy of a substance during a change of state according to the kinetic theory? A) Particles change color. B) Energy is added or removed from a substance. C) Particles become larger. D) Particles stop moving. Show Answer Correct Answer: B) Energy is added or removed from a substance. 16. Absolute zero refers to the temperature when what happens? A) Particles have no energy. B) Particles have maximum energy. C) Particles start to vibrate. D) Particles collide. Show Answer Correct Answer: A) Particles have no energy. 17. Discuss the application of molecular kinetic theory in real-life scenarios. A) Molecular kinetic theory has no practical use in understanding gas behavior. B) Molecular kinetic theory helps explain gas behavior, diffusion, osmosis, and material properties. C) Molecular kinetic theory is only applicable to solid materials. D) Molecular kinetic theory is limited to theoretical physics and has no real-world applications. Show Answer Correct Answer: B) Molecular kinetic theory helps explain gas behavior, diffusion, osmosis, and material properties. 18. Isolate M from pv = mRT/M A) M = pv/mRT. B) M = mRT/pv. C) M = RT/pv. D) M = pv/RT. Show Answer Correct Answer: B) M = mRT/pv. 19. The amount of energy needed to change a material from a liquid to a gas. A) Heat of Liquids. B) Heat of Gas. C) Heat of Fusion. D) Heat of Vaporization. Show Answer Correct Answer: D) Heat of Vaporization. 20. According to the kinetic theory, the temperature of a gas is directly proportional to the average ..... of its molecules. A) Velocity. B) Kinetic energy. C) Potential energy. D) Pressure. Show Answer Correct Answer: B) Kinetic energy. 21. For a mono atomic gas there are ..... degrees of freedom and the average total Kinetic Energy per molecule for any mono-atomic gas is ..... A) $3, \\frac{3}{2}k_BT$. B) $5, \\frac{5}{2}k_BT$. C) $3, \\frac{5}{2}k_BT$. D) $5, \\frac{3}{2}k_BT$. Show Answer Correct Answer: A) $3, \\frac{3}{2}k_BT$. 22. The ratio of isothermal bulk modulus to the adiabatic bulk modulus for a monoatomic gas is given by A) $\frac{5}{3}$. B) $\frac{3}{5}$. C) $1.4$. D) $1$. Show Answer Correct Answer: B) $\frac{3}{5}$. 23. How does the rate of diffusion change with an increase in temperature? A) Faster. B) Slower. C) Unaffected. D) Impossible to tell. Show Answer Correct Answer: A) Faster. 24. What could be the change when heat is supplied to a gas? A) The particles in the matter expand tremendously. B) The particles move randomly at all directions. C) The average kinetic energy of the particles increases. D) The particles contract and occupy lesser space. Show Answer Correct Answer: C) The average kinetic energy of the particles increases. 25. Which is not an assumption about gas particles in the kinetic theory model for a gas? A) They collide elastically with the container walls. B) They have negligible size compared to the distance between the container walls. C) They travel between the container walls in negligibly short times. D) They collide with the container walls in negligibly short times. Show Answer Correct Answer: C) They travel between the container walls in negligibly short times. ← PreviousNext →Related QuizzesClass 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 1Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 2Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 3Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 5Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 6Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 7Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 8Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 9Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 10Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books