This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 15 Kinetic Theory Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. On this temperature scale, there can NEVER be negative numbers A) Celsius. B) Fahrenheit. C) Kelvin. D) None of the above. Show Answer Correct Answer: C) Kelvin. 2. If a solid substances changes straight into a gas without going through the liquid phase, this is known as ..... A) Vaporization. B) Sublimation. C) Condensation. D) Impossible. Show Answer Correct Answer: B) Sublimation. 3. What is the main assumption of the kinetic molecular theory regarding the size of gas particles? A) Gas particles have a significant volume. B) Gas particles are larger than the space between them. C) Gas particles are considered to have negligible volume. D) Gas particles are the same size as the space between them. Show Answer Correct Answer: C) Gas particles are considered to have negligible volume. 4. Which of the following best explains why gases are compressible according to the Kinetic Theory? A) Gas particles are very small and occupy negligible space. B) Gas particles are in constant motion and can be pushed closer together. C) Gas particles have strong intermolecular forces. D) Gas particles are heavy and can be compressed easily. Show Answer Correct Answer: B) Gas particles are in constant motion and can be pushed closer together. 5. A fixed mass of gas at a constant temperature has a volume of 50 litres at a temperature of 27 $^{o}$C. If the temperature falls to 0$^{o}$C, what is the new volume? (I'll give you two minutes for this one ..... OK, I'll give you three) A) 45.5 litres. B) 0 litres. C) 55.5 litres. D) 35.5 litres. Show Answer Correct Answer: A) 45.5 litres. 6. The melting point is the temperature of the solid when its ..... begins to disintegrate A) Solid. B) Particles. C) Crystal lattice. D) None of the above. Show Answer Correct Answer: C) Crystal lattice. 7. What happens to gas pressure when volume decreases? A) Gas pressure increases when volume decreases. B) Gas pressure fluctuates randomly when volume decreases. C) Gas pressure decreases when volume decreases. D) Gas pressure remains constant when volume decreases. Show Answer Correct Answer: A) Gas pressure increases when volume decreases. 8. Solids have ..... kinetic energy A) Equal. B) High. C) Medium. D) Low. Show Answer Correct Answer: D) Low. 9. When does diffusion stop? A) After a day and a night. B) When the particles are evenly spread out. C) When there are no particles left. D) When all the particles leave the system. Show Answer Correct Answer: B) When the particles are evenly spread out. 10. Which of the following would increase the pressure on a system? A) Increase the Temperature. B) Pump in more gas. C) Decrease the volume. D) All of these. Show Answer Correct Answer: D) All of these. 11. When the volume of air in a syringe is reduced at constant pressure, the pressure of in the syringe increases because A) The air molecules collide with the walls of the syringe more frequently. B) The air molecules collide with the walls of the syringe more vigorously. C) The air molecules collide with the walls of the syringe more frequently and more vigourously. D) The number of air molecules in the syringe increases. Show Answer Correct Answer: A) The air molecules collide with the walls of the syringe more frequently. 12. Railroad tracks have gaps between rails so they don't buckle in hot weather because A) Thermal expansion. B) Thermal insulation. C) Thermal conductivity. D) Specific heat. Show Answer Correct Answer: A) Thermal expansion. 13. Gas pressure is caused by A) Gas molecules colliding with other gas molecules. B) Barometers. C) Gas molecules condensing into a liquid. D) Gas molecules colliding with surfaces. Show Answer Correct Answer: D) Gas molecules colliding with surfaces. 14. Which of the following best describes the behavior of liquids compared to gases? A) Liquids expand to fill their container. B) Liquids can be compressed easily. C) Liquids have a definite shape and volume. D) None of the above. Show Answer Correct Answer: C) Liquids have a definite shape and volume. 15. When you push down on a bike tyre, you feel resistance because A) The kinetic energy of the particles increases so the temperature increases. B) The kinetic energy of the particles increases so the pressure increases. C) The volume has increased so the pressure increases. D) The volume has decreased so the pressure increases. Show Answer Correct Answer: D) The volume has decreased so the pressure increases. 16. What is the effect of temperature on the viscosity of a liquid according to the Kinetic Theory? A) Viscosity is not affected by temperature. B) Viscosity remains constant with temperature. C) Viscosity decreases with temperature. D) Viscosity increases with temperature. Show Answer Correct Answer: C) Viscosity decreases with temperature. 17. What would you expect to happen if you decrease the pressure of an ideal gas while keeping the temperature constant? A) The volume will increase. B) The volume will decrease. C) All the above. D) None of the above. Show Answer Correct Answer: A) The volume will increase. 18. When water evaporates from a beaker. Which particles gain enough energy to turn into gas? A) Only the particles on the sides of the beaker. B) Only the particles on the surface of the water. C) Any water particle anywhere within the water. D) Only the particles on the bottom of the beaker. Show Answer Correct Answer: B) Only the particles on the surface of the water. 19. The molecules inside of a solid are ..... in their crystalline pattern. A) Not moving. B) Vibrating. C) Floating randomly. D) None of the above. Show Answer Correct Answer: B) Vibrating. 20. Which of the following best describes the kinetic theory of liquids? A) Particles are in fixed positions and vibrate in place. B) Particles move freely and fill the entire container. C) Particles are closely packed but can move past one another. D) Particles are ionized and conduct electricity. Show Answer Correct Answer: C) Particles are closely packed but can move past one another. 21. Which condition is necessary for mostgases to behave nearly ideally? A) Highpressure. B) Low compressibility. C) High temperature. D) Low expansion. Show Answer Correct Answer: C) High temperature. 22. Which of the following is true about the relationship between pressure and volume when temperature is kept constant? A) As volume increases, pressure increases at an increasing rate. B) As volume increases, pressure increases at a decreasing rate. C) As volume increases, pressure decreases at a decreasing rate. D) As volume increases, pressure remains unchanged. Show Answer Correct Answer: C) As volume increases, pressure decreases at a decreasing rate. 23. Solid ..... particles have no kinetic energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 24. What is the significance of the Maxwell-Boltzmann distribution? A) It explains the chemical reactions in a liquid solution. B) It describes the distribution of speeds of particles in a gas at thermal equilibrium. C) It models the gravitational forces between celestial bodies. D) It predicts the behavior of solid materials under stress. Show Answer Correct Answer: B) It describes the distribution of speeds of particles in a gas at thermal equilibrium. 25. The amount of energy needed change a substance from a solid phase to a liquid phase A) Freezing Point. B) Melting Point. C) Heat of Vaporization. D) Heat of Fusion. E) Boiling Point. Show Answer Correct Answer: D) Heat of Fusion. 26. A letter or pair of letters used as a shorthand method of writing the name of an element is called the ..... A) Chemical Symbol. B) Describer. C) Chemical Letters. D) Atomic Number. Show Answer Correct Answer: A) Chemical Symbol. 27. What does Avogadro's constant, N$_{A}$, represent A) Number of particles. B) Number of molecules. C) Number of particles in 1 mole. D) Number of moles. Show Answer Correct Answer: C) Number of particles in 1 mole. 28. When the temperature of air inside a tyre (fixed volume) increases, the pressure inside the tyre increases because A) The air molecules collide with each other more vigorously and frequently. B) The air molecules collide with the walls of the tyre more vigorously. C) The air molecules collide with the walls of the tyre more frquently. D) The air molecules collide with the walls of the tyre more vigorously and frequently. Show Answer Correct Answer: D) The air molecules collide with the walls of the tyre more vigorously and frequently. 29. The ability or tendency to float. A) Viscosity. B) Buoyancy. C) Kinetic theory. D) None of the above. Show Answer Correct Answer: B) Buoyancy. 30. According to the kinetic molecular theory, the molecules of an ideal gas A) Have a strong attraction for each other. B) Have significant volume. C) Move in random, constant, straight-line motion. D) Are closely packed in a regular repeating pattern. Show Answer Correct Answer: C) Move in random, constant, straight-line motion. 31. In the kinetic theory of gases, what is the significance of the term $\frac{1}{2}mv^2$ A) It represents the kinetic energy of gas particles. B) It represents the pressure of the gas. C) It represents the potential energy of gas particles. D) It represents the volume of the gas. Show Answer Correct Answer: A) It represents the kinetic energy of gas particles. 32. When any kind of gas such, as nitrogen or carbon dioxide, is heated, it A) Sublimates. B) Evaporates. C) Explodes. D) Expands. Show Answer Correct Answer: D) Expands. 33. For an ideal gas at constant temperature and pressure p at volume V, what affect would halving the pressure have on the volume? A) Volume would double. B) Volume would halve. C) Volume would triple. D) None. Show Answer Correct Answer: A) Volume would double. 34. The Kinetic Theory of Matter states that all matter A) Is made of small particles. B) The particles are in random motion and have space between them. C) All of the above are true. D) None of the above. Show Answer Correct Answer: C) All of the above are true. 35. Which of the following best describes the concept of absolute zero in the context of kinetic theory? A) The temperature at which gas volume is maximum. B) The temperature at which molecular motion ceases. C) The temperature at which gas pressure is maximum. D) The temperature at which gas density is maximum. Show Answer Correct Answer: B) The temperature at which molecular motion ceases. 36. The state of matter with definite volume, but no definite shape is A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: B) Liquid. 37. Thermal energy is the same as A) The kinetic energy. B) The temperature. C) The potential energy. D) The sum of the kinetic and potential energy of all the particles of an object. Show Answer Correct Answer: D) The sum of the kinetic and potential energy of all the particles of an object. 38. True or False:Plasma is not commonly found in its natural state. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 39. Which of the following is not an assumption of kinetic theory of gases? A) The number of particles are large. B) The total volume of the particles are negligible compare to the volume of container. C) The collisions of particles are elastic. D) The particles are moving with the same speed. Show Answer Correct Answer: D) The particles are moving with the same speed. 40. A chunk of ice is added to a bowl of hot soup. Which following statement is true? A) Heat leaves the soup and enters the ice. B) Cold leaves the ice and enters the soup. C) Heat is passed back and forth between the ice and the soup. D) No heat is exchanged. Show Answer Correct Answer: A) Heat leaves the soup and enters the ice. 41. According to kinetic theory of gases, at absolute zero of temperature A) Molecular motion stops. B) Liquid helium freezes. C) Water freezes. D) Liquid hydrogen freezes. Show Answer Correct Answer: A) Molecular motion stops. 42. How does increasing temperature affect particle motion in a substance? A) It decreases thermal energy and slows particles. B) It increases thermal energy and makes particles move faster. C) It causes particles to become fixed in place. D) It turns solids directly into gases. Show Answer Correct Answer: B) It increases thermal energy and makes particles move faster. 43. According to Kinetic Theory:Particles are always moving. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 44. Kinetic Theory is that submicroscopic particles move in ..... and ..... motion A) Clear; consistent. B) Random; Constant. C) Uniform; Straight. D) Strange; Crazed. Show Answer Correct Answer: B) Random; Constant. 45. The energy of motion is called ..... A) Kinetic energy. B) Unstatic energy. C) Emotive energy. D) Kelvin energy. Show Answer Correct Answer: A) Kinetic energy. 46. Average Temperature and Average Kinetic Energy have a ..... relationship A) Inversely proportional. B) Directly proportional. C) All the above. D) None of the above. Show Answer Correct Answer: B) Directly proportional. 47. What happens to particle movement/speed when energy is added to a phase? A) Particles slow down. B) Particles don't move. C) Particles stay the same speed. D) Particles go faster. Show Answer Correct Answer: D) Particles go faster. 48. Boiling and evaporation are different processes. Which statement is not correct? A) Boiling occurs throughout the entire liquid but evaporation only occurs at the surface. B) Evaporation can only occur when the temperature of the liquid is high enough. C) Evaporation causes the temperature of a liquid to fall. D) When a boiling liquid is heated its temperature remains constant. Show Answer Correct Answer: B) Evaporation can only occur when the temperature of the liquid is high enough. 49. The r.m.s velocity of the molecules of an ideal gas is C at a temperature of 100K. at what temperature is r.m.s. velocity will be doubted? A) 400 K. B) 300 K. C) 50 K. D) 200 K. Show Answer Correct Answer: A) 400 K. 50. If you place a balloon in a freezer what happens to the size of the balloon? A) Increases. B) Decreases. C) Doubles. D) Stays still. Show Answer Correct Answer: B) Decreases. 51. A subatomic particle that has a positive charge and that is found in the nucleus of an atom A) Quark. B) Proton. C) Atom. D) Electron. E) Neutron. Show Answer Correct Answer: B) Proton. 52. What do we call the theory that we use to describe the particles in solids liquids and gases A) Critical Theory. B) Potential Theory. C) Kinetic theory. D) General Theory. Show Answer Correct Answer: C) Kinetic theory. 53. Which state of matter has the lowest kinetic energy? A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: A) Solid. 54. When something goes from gas to liquid, it is called ..... A) Freezing. B) Evaporation. C) Deposition. D) Condensation. Show Answer Correct Answer: D) Condensation. 55. A liquid is heated. Which of the following statements are incorrect? A) The liquid molecules expand. B) The intermolecular spacing increases. C) The molecules gain energy. D) The molecules move faster. Show Answer Correct Answer: A) The liquid molecules expand. 56. Covalent Compounds HAVE a positive (+) or negative (-) charge A) False. B) Que onda, Hagerman?. C) True. D) What was that now?. Show Answer Correct Answer: A) False. 57. As a material is heated, it's particles ..... A) Get smaller. B) Slow down. C) Get cooler. D) Move more quickly. Show Answer Correct Answer: D) Move more quickly. 58. Solids have high densities relative to liquids because 1 the particles in solids are far apart.2 the particles in solids have large masses.3 the particles in solids do not move about. A) 1 only. B) 2 only. C) 2 and 3 only. D) None of the above. Show Answer Correct Answer: D) None of the above. 59. The total energy of oxygen molecules, (where k$_{B}$ is Boltzmann constant). A) $\frac{5}{2}k_BT$. B) $\frac{9}{2}k_BT$. C) $\frac{1}{2}k_BT$. D) $\frac{3}{2}k_BT$. Show Answer Correct Answer: A) $\frac{5}{2}k_BT$. 60. A real gas differs from an ideal gas because the molecules of a real gas have A) Some volume and no intermolecular forces. B) Some volume and some intermolecular forces. C) No volume and no intermolecular forces. D) No volume and some intermolecular forces. Show Answer Correct Answer: B) Some volume and some intermolecular forces. 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