This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. LFP in the Rankine Scale is ..... A) 492$^{0}$R. B) 100$^{0}$R. C) 672$^{0}$R. D) 273.15$^{0}$ R. Show Answer Correct Answer: A) 492$^{0}$R. 2. My coffee and the creamer have the same temp. My cofee and the cup have the same temp. So ..... Creamer and cup have same temp. A) 1st law of thermodynamics. B) Zeroth Law. C) 3rd law of thermodynamics. D) 2nd law of thermodynamics. Show Answer Correct Answer: B) Zeroth Law. 3. The Law of ..... states that energy cannot be created nor destroyed only transferred A) Exothermic Reaction. B) Conservation of Energy. C) Potential Energy. D) Specific Heat. Show Answer Correct Answer: B) Conservation of Energy. 4. Ice in water is an example for A) Microscopic system. B) Homogeneous system. C) Isolated system. D) Heterogeneous system. Show Answer Correct Answer: D) Heterogeneous system. 5. Carnot's theorem A) The efficiency of a Carnot engine is independent of the working material of the engine. B) Shows that a Carnot engine combined with a more efficient engine would constitute a perfect heat engine. C) All perfectly reversible engines operating between two given temperatures have the same efficiency. D) All the above. Show Answer Correct Answer: D) All the above. 6. What mass of P$_{4}$ must be reacted to produce 5905 kJ of energy?P$_{4}$ + 6Cl$_{2}$ $\rightarrow$ 4PCl$_{3}$ + 2439 kJ A) 2.421 g. B) 25.43 g. C) 300.0 g. D) 563.0 g. Show Answer Correct Answer: C) 300.0 g. 7. The distance travelled by an atom between two successive collisions is called A) Free path. B) Wavelength. C) Mean free path. D) Displacement. Show Answer Correct Answer: A) Free path. 8. During a science class, Ishaan asked, which of the following is not an example of a low temperature reservoir? A) Atmosphere. B) Ocean. C) River. D) Furnace. Show Answer Correct Answer: D) Furnace. 9. Why does a gas have more entropy? A) Gas molecules spread in random ways. B) Because gas is invisible. C) Gas has no energy. D) They are small particles. Show Answer Correct Answer: A) Gas molecules spread in random ways. 10. What is the name of the process in which pressure remains constant. A) Isochoric process. B) Isolated process. C) Isobaric process. D) Adiabatic process. Show Answer Correct Answer: C) Isobaric process. 11. Heat transferred by direct contact is: A) Illegal because quarantine. B) Radiation. C) Convention. D) Conduction. Show Answer Correct Answer: D) Conduction. 12. A piece of ice is added to water in a cup. The entropy A) No change. B) Increased. C) Decreased. D) Decreases then increases. Show Answer Correct Answer: B) Increased. 13. Which equation correctly represents the free energy change in a chemical reaction? A) $\Delta$G = $\Delta$H-T$\Delta$S. B) $\Delta$G = $\Delta$T-$\Delta$H$\Delta$S. C) $\Delta$G = $\Delta$S-T$\Delta$H. D) $\Delta$G = $\Delta$H + T$\Delta$S. Show Answer Correct Answer: A) $\Delta$G = $\Delta$H-T$\Delta$S. 14. Is burning a candle exothermic or endothermic? A) Exothermic reaction. B) Endothermic reaction. C) All the above. D) None of the above. Show Answer Correct Answer: A) Exothermic reaction. 15. In a closed system, if the internal energy decreases by 50 J and the system does 30 J of work on the surroundings, what is the amount of heat exchanged? A) 80 J absorbed by the system. B) 20 J absorbed by the system. C) 20 J released by the system. D) 80 J released by the system. Show Answer Correct Answer: C) 20 J released by the system. 16. ..... of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states. A) Heat of combustion. B) Heat of formation. C) Standard Heat of formation. D) Standard heat of reaction. Show Answer Correct Answer: C) Standard Heat of formation. 17. Is iron rusting in a moist atmosphere a spontaneous or nonspontaneous process? A) Spontaneous. B) Nonspontaneous. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nonspontaneous. 18. Energy resulting from the motion of a substance's molecules A) 1st law of thermodynamics. B) 2nd law of thermodynamics. C) Internal energy. D) None of the above. Show Answer Correct Answer: C) Internal energy. 19. For an adiabatic process A) Temperature changes are bound to occur. B) Perfect thermal insulation with surroundings are required. C) Process should be quick. D) All of the above are correct. Show Answer Correct Answer: D) All of the above are correct. 20. Is the phase change representing an exothermic or endothermic reaction?SOLID to LIQUID A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Endothermic. 21. What does the Zeroth Law of Thermodynamics state? A) Energy cannot be created or destroyed. B) It is impossible to reach absolute zero temperature. C) Entropy of an isolated system always increases. D) If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other. Show Answer Correct Answer: D) If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other. 22. Heat is added to a substance, but its temperature does not increase. Which one of the following statements provides the best explanation for this observation? A) The substance has unusual thermal properties. B) The substance must be a gas. C) The substance undergoes a change of phase. D) The substance must be cooler than its environment. E) The substance must be an imperfect solid. Show Answer Correct Answer: C) The substance undergoes a change of phase. 23. The shape of Carnot cycle in the temperature entropy diagram is A) Rectangle. B) Trapezium. C) Rhombus. D) Parallelogram. Show Answer Correct Answer: A) Rectangle. 24. Calculate the change in energy (in kJ) for the reaction shown below, if you begin with 150.0 grams of oxygen (O2), and the $\Delta$Hrxn =-902.0 kJ. 4 NH3(g) + 5 O2(g) $\rightarrow$ 4 NO(g) + 6 H2O(g) A) -423 kJ. B) -828 kJ. C) -846 kJ. D) -428 kJ. Show Answer Correct Answer: C) -846 kJ. 25. The value of Cv for diatomic gas is A) 3/2R. B) 7/2R. C) 5/2 R. D) 9/2 R. Show Answer Correct Answer: C) 5/2 R. 26. 2H$_{2}$O + 25 kJ $\rightarrow$ 2H$_{2 }$+ O$_{2}$ How much energy is absorbed when 36 grams of water is decomposed? A) 12.5 kJ. B) 50 kJ. C) 25 kJ. D) 900 kJ. Show Answer Correct Answer: C) 25 kJ. 27. A positive value of Joule-Thompson coefficient of a fluid means A) Temperature drops during throttling. B) Temperature remains constant during throttling. C) Temperature rises during throttling. D) None of these. Show Answer Correct Answer: A) Temperature drops during throttling. 28. An ideal calorimeter is one where A) All calories are converted into heat. B) Calories are measured carefully. C) No heat leaks out of the container. D) Temperature can be measured. Show Answer Correct Answer: C) No heat leaks out of the container. 29. There are four main processes in changing of phase, and they are A) Melting. B) Boiling. C) Condensation. D) All the above. Show Answer Correct Answer: D) All the above. 30. As the temperature of an abject increases, its molecules A) Move faster. B) Get samller (condense). C) Move farther apart (expand). D) Move faster and farther apart (expand). Show Answer Correct Answer: D) Move faster and farther apart (expand). 31. Thermodynamics process in which the temperature remains constant is known as A) Isochoric process. B) Isobaric process. C) Isovolumetric process. D) Isothermal process. Show Answer Correct Answer: D) Isothermal process. 32. Which law establishes the concept of temperature? A) 2nd. B) Zeroeth. C) 3rd. D) 1st. Show Answer Correct Answer: B) Zeroeth. 33. Which law of thermodynamics is used to understand the concept of energy conservation? A) Zeroth law. B) First law. C) Second law. D) None of these. Show Answer Correct Answer: B) First law. 34. Define the distinctive features of a 'first-order reaction': A) The duration for half of the reactants to disappear remains constant. B) The rate of the reaction remains unaffected by changes in reactant concentration. C) The rate of the reaction varies directly with the concentration. D) When the concentration is doubled, the reaction rate also doubles. Show Answer Correct Answer: D) When the concentration is doubled, the reaction rate also doubles. 35. The product of the displacement of the body and the component of force in the direction of the displacement A) Work. B) Energy. C) Heat. D) Workflow. Show Answer Correct Answer: A) Work. 36. What happens to the rate of a reaction when the concentration of reactants increases? A) The rate becomes unpredictable. B) The rate decreases. C) The rate increases. D) The rate remains constant. Show Answer Correct Answer: C) The rate increases. 37. If an ideal gas is compressed isothermally, which ofthe following statements is true? A) Energy is transferred to the gas by heat. B) No work is done on the gas. C) The temperature of the gas increases. D) The internal energy of the gas remains constant. E) None of those statements is true. Show Answer Correct Answer: D) The internal energy of the gas remains constant. 38. A) Diathermal wall is one with A) Thermally conducting wall. B) Insulator. C) Both Thermally conducting wall and Insulator. D) None of these. Show Answer Correct Answer: A) Thermally conducting wall. 39. This refers to the heat required to change the phase of a substance A) Latent Heat. B) Specific Heat. C) Sensible Heat. D) Fusion. Show Answer Correct Answer: A) Latent Heat. 40. According to the second law of thermodynamics, which of the following statements is true? A) Entropy of an isolated system remains constant. B) Entropy of an isolated system always decreases. C) Entropy of an isolated system always increases. D) Entropy of an isolated system can fluctuate. Show Answer Correct Answer: C) Entropy of an isolated system always increases. 41. The entropy of the universe tends to be maximum. What of the laws of thermodynamics generalises to the above statement? A) Zeroth. B) Second. C) First. D) Third. Show Answer Correct Answer: B) Second. 42. Thermodynamics is the study of ..... and heat. A) Force. B) Mass. C) Energy. D) Temperature. Show Answer Correct Answer: C) Energy. 43. What does Gibbs Free Energy tell us? A) How much energy is given off by a reaction. B) The tendency of a reaction to become "random". C) How spontaneous a reaction is. D) None of the above. Show Answer Correct Answer: C) How spontaneous a reaction is. 44. The unit for specific heat A) Cal/gram degrees Celsius. B) Degrees Celsius. C) Calories. D) None of the above. Show Answer Correct Answer: A) Cal/gram degrees Celsius. 45. If a system goes from initial to final state without changing internal energy, then the heat supplied to system is A) Fully utilised for doing work. B) Partially utilised for doing work by the system. C) Partially utilised for doing work on the system. D) Not used for doing work. Show Answer Correct Answer: A) Fully utilised for doing work. 46. How much heat is needed to form 164.3 g of NO$_{2?}$N$_{2}$+ 2O$_{2}$ $\rightarrow$ 2NO$_{2}$$\Delta$H = +67kJ A) 59.8. B) 239.2. C) 119.6. D) 58.2 kJ. Show Answer Correct Answer: C) 119.6. 47. The molecular volume of any perfect gas at 600 x 103 N/m3 and 27?C will be A) 41.7 m3/kg mol. B) 4.17 m3/kg mol. C) 47.7 m3/kg mol. D) 85.3 m3/kg mol. E) 2.085 m3/kg mol. Show Answer Correct Answer: B) 4.17 m3/kg mol. 48. Identify the incorrect statement among the following.-A:The Second Law of Thermodynamics states that the entropy of an isolated system always increases over time.-B:It implies that energy transformations are not completely efficient, as some energy is always lost as heat.-C:This law dictates that heat can spontaneously flow from a colder to a hotter body. A) A. B) B. C) C. D) None of the above. Show Answer Correct Answer: C) C. 49. Coefficient of Viscocity of a gas is independent of A) Average molecular velocity. B) Pressure. C) Absolute Temperature. D) Mass of Molecule of gas. Show Answer Correct Answer: B) Pressure. 50. Enthalpy (H) is defined by the relation A) H = U + PV. B) H = UV + P. C) H = PV-U. D) H = U-PV. Show Answer Correct Answer: A) H = U + PV. 51. What determines the temperature of an object? A) The amount of heat it absorbs from the environment. B) The amount of kinetic energy in an object. C) The amount of heat it radiates. D) The amount of potential energy in an object. Show Answer Correct Answer: B) The amount of kinetic energy in an object. 52. In which of the following systems is entropy increasing? A) Breaking a plate. B) Putting together a puzzle. C) Filling a jar of salt. D) Putting books on a shelf. Show Answer Correct Answer: A) Breaking a plate. 53. During adiabatic, internally reversible process, what is true about the change in entropy? A) It is always less than zero. B) It is always greater than zero. C) It is temperature dependent. D) It is always zero. Show Answer Correct Answer: D) It is always zero. 54. Why do engineering devices such as pumps, turbines, nozzles, and diffusers perform best when irreversibilities such as friction are minimized? A) Minimizing irreversibilities reduces energy losses and provides less efficient operation. B) Minimizing irreversibilities increases energy losses and provides more efficient operation. C) Minimizing irreversibilities reduces energy losses and provides more efficient operation. D) None of the above. Show Answer Correct Answer: C) Minimizing irreversibilities reduces energy losses and provides more efficient operation. 55. Heat output cannot exceed heat input; or energy output cannot exceed energy input A) Zeroth Law of Thermodynamics. B) Second Law of Thermodynamics. C) First Law of Thermodynamics. D) Third Law of Thermodynamics. Show Answer Correct Answer: C) First Law of Thermodynamics. 56. Heat transfers from an area of ..... temperature to an area of ..... temperature. A) High-High. B) Low-High. C) High-Low. D) Low-Low. Show Answer Correct Answer: C) High-Low. 57. When applying the first law of thermodynamics to a system, when is heat a positive quantity? A) When the system absorbs heat. B) When the system does work. C) When the system has work done on it. D) When no work is done either on the system or by the system. E) When the system loses heat. Show Answer Correct Answer: A) When the system absorbs heat. 58. Melting point of ice is ..... $^{0}$ C A) 180. B) 0. C) 100. D) 120. Show Answer Correct Answer: B) 0. 59. The ..... of thermal dynamics tells that heat always flows from a hot body to a cold body till both bodies have an equal temperature A) Zeroth law. B) Third law. C) Second law. D) First law. Show Answer Correct Answer: A) Zeroth law. 60. Thermodynamic properties are A) Macroscopic in nature. B) Microscopic in nature. C) Neither micro nor macroscopic. D) None of the above. Show Answer Correct Answer: A) Macroscopic in nature. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 1Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 3Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 4Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 5Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 6Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 7Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 8Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books