This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 12 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Benjamin wants to make ice cubes for a party. To freeze the water in the ice cube tray, he should ..... A) Add energy to the water. B) Remove energy from the water. C) All the above. D) None of the above. Show Answer Correct Answer: B) Remove energy from the water. 2. Which of the following is true for a steady flow system? A) Mass entering = mass leaving. B) Mass does not enter or leave the system. C) Mass entering can be more or less than the mass leaving. D) None of the above. Show Answer Correct Answer: A) Mass entering = mass leaving. 3. Heating a closed, steel container is an example of an A) Isovolumetric process. B) Isobaric process. C) Isothermal process. D) Adiabatic process. Show Answer Correct Answer: A) Isovolumetric process. 4. The mathematical equation of the first law of thermodynamics is ..... A) $\Delta$U=W. B) $\Delta$U=Q. C) $\Delta$U=Q-W. D) None of the above. Show Answer Correct Answer: C) $\Delta$U=Q-W. 5. What is the standard enthalpy change of formation for an element in its most stable form? A) Zero. B) Positive. C) Negative. D) Depends on the element. Show Answer Correct Answer: A) Zero. 6. The measure of kinetic energy in matter A) Temperature. B) Internal energy. C) Heat. D) None of the above. Show Answer Correct Answer: A) Temperature. 7. Refer the the following question:2N$_{2}$ + 3H$_{2}$ $\rightarrow$ 2NH$_{3}$ + 46 kJHow much energy would be produced if 18.2 g of nitrogen reacted with excess hydrogen? A) 23 kJ. B) 0.143 kJ. C) 92 kJ. D) 15 kJ. Show Answer Correct Answer: D) 15 kJ. 8. The enthalpy of a reaction is the negative of the enthalpy of the reverse reaction. A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 9. What is the primary implication of the second law of thermodynamics in terms of entropy? A) Entropy remains constant. B) Entropy is irrelevant. C) Entropy of an isolated system always decreases. D) Entropy of an isolated system always increases. Show Answer Correct Answer: D) Entropy of an isolated system always increases. 10. The handle of a frying pan is often coated in rubber because rubber provides ..... A) Heat conduction. B) A nonstick surface. C) A low melting point. D) Heat insulation. Show Answer Correct Answer: D) Heat insulation. 11. Arjun and Scarlett are observing a chemical reaction in their chemistry class. They notice that the number of particles in the system increases during the reaction. Can they conclude that the entropy of the system also increases? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 12. An adiabatic process occurs at constant A) Temperature. B) Pressure. C) Heat. D) None of these. Show Answer Correct Answer: C) Heat. 13. Which of the following laws is applicable for the behaviour of perfect gas ..... A) Boyle's law. B) Charle's Law. C) Gas Lussac law. D) All of the above. Show Answer Correct Answer: D) All of the above. 14. Value of gamma (cp/cv) for monaotomic gas is A) 1.34. B) 1.44. C) 2.09. D) 1.67. Show Answer Correct Answer: D) 1.67. 15. Identify the incorrect statement among the following.-A:Hess's Law states that the total enthalpy change for a reaction is the same, irrespective of the number of steps in the reaction.-B:According to Hess's Law, the enthalpy change of a reaction is directly proportional to the amount of reactants used.-C:It allows for the calculation of the enthalpy change of a reaction that is difficult to measure directly. A) A. B) B. C) C. D) None of the above. Show Answer Correct Answer: B) B. 16. The entropy(disorder) of the universe is always A) Increasing. B) Decreasing. C) Staying the same. D) None of the above. Show Answer Correct Answer: A) Increasing. 17. If external pressure is zero .the work done will be A) Negative. B) Positive. C) Zero. D) None of the above. Show Answer Correct Answer: C) Zero. 18. If 334000 J of heat is required to change state of 1 kg of ice into water then heat of fusion is A) 334000 kg. B) 668000 J. C) 334000 J/kg. D) 668000 J/kg. Show Answer Correct Answer: C) 334000 J/kg. 19. The temperature of the system reduces in an A) Adiabatic Compression. B) Adiabatic expansion. C) Isothermal Expansion. D) Isothermal compression. Show Answer Correct Answer: B) Adiabatic expansion. 20. Which one is true about energy form of macroscopic? A) Relates to degree of molecular activity. B) Relates to molecular structure of a system. C) Independant to outside reference frames. D) Dependent to some outside reference. Show Answer Correct Answer: D) Dependent to some outside reference. 21. Everything in the universe that is outside a defined system. A) Open system. B) Surroundings. C) Thermodynamics. D) Closed system. Show Answer Correct Answer: B) Surroundings. 22. In which type of process pressure remains constant? A) Isothermal process. B) Isobaric process. C) Adiabatic process. D) Isochoric process. Show Answer Correct Answer: B) Isobaric process. 23. Which is the best example of an object with only potential energy? A) Water being poured out of a pitcher. B) A ball being thrown across a field. C) A boulder resting on top of a cliff. D) A boat sailing through the water. Show Answer Correct Answer: C) A boulder resting on top of a cliff. 24. As heat energy increases, particle motion: A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Increases. 25. When a gas undergoes isothermal expansion, its internal energy A) Increase. B) Zero. C) Remains constant. D) Decrease. Show Answer Correct Answer: C) Remains constant. 26. Which type of system is always used in the Laws of Thermodynamics? A) Skeletal System (obviously). B) Isolated Systems. C) Open Systems. D) Closed Systems. Show Answer Correct Answer: D) Closed Systems. 27. A Carnot engine operates between 200$^\circ$C and 20$^\circ$C. Its maximum possible efficiency is A) 100%. B) 72%. C) 90%. D) 24%. E) 38%. Show Answer Correct Answer: E) 38%. 28. When excess HCl reacts with 0.250 mole of NH$_{3}$, a total of 11.0 kJ of heat energy is released. What is the value of $\Delta$H in kJ per mole NH$_{3}$ consumed? A) -11.0. B) +11.0. C) +44.0. D) -44.0. Show Answer Correct Answer: D) -44.0. 29. Which law of thermodynamics introduces the concept of entropy? A) Third Law. B) First Law. C) Zeroth Law. D) Second Law. Show Answer Correct Answer: D) Second Law. 30. Which of the following statements is NOT a correct assumption of the classical model of an ideal gas? A) The molecules are in random motion. B) The volume of the molecules is negligible compared with the volume occupied by the gas. C) The molecules obey Newton's laws of motion. D) The collisions between molecules are inelastic. Show Answer Correct Answer: D) The collisions between molecules are inelastic. 31. The thermal energy needed to boil a liquid is the heat of ..... A) Condensation. B) Specific heat. C) Fusion. D) Vaporization. Show Answer Correct Answer: D) Vaporization. 32. In a heat engine, which of the following is true about the efficiency if the temperature of the cold reservoir is decreased? A) Efficiency becomes zero. B) Efficiency increases. C) Efficiency remains the same. D) Efficiency decreases. Show Answer Correct Answer: B) Efficiency increases. 33. J of heat are added to a sample of gas while the gas does 400 J of work on the environment. What is the change in internal energy of the gas? A) -1600 J. B) 800 J. C) 1600 J. D) -800 J. Show Answer Correct Answer: B) 800 J. 34. Study of the relationship between thermal energy, heat, and work. A) Heat. B) Heat engine. C) 2nd law of thermodynamics. D) Themodynamics. E) 1st Law of Thermodynamics. Show Answer Correct Answer: D) Themodynamics. 35. A thermal property that remains constant during an adiabatic process. A) Efficiency. B) Volume. C) Entropy. D) None. Show Answer Correct Answer: C) Entropy. 36. Area under P-V diagram gives A) Internal energy. B) Work done. C) Heat. D) Temperature. Show Answer Correct Answer: B) Work done. 37. In a pressure cooker, a lid is screwed tightly onto a pot so that the air pressure in the pot is increased. What effect, if any, will this have on the boiling point of water in the pot? A) The boiling point will be raised. B) The boiling point will be lowered. C) The boiling point will be unaffected. D) None of the above. Show Answer Correct Answer: A) The boiling point will be raised. 38. A gas expands isothermally against a constant external pressure of 1 atm from a volume of 10dm3 to a volume of 20L . In this process it absorbs 800J of thermal energy from its surroundings . Calculate the internal energy change in the entire process in Joules. A) 213. B) 826. C) 200. D) 400. Show Answer Correct Answer: A) 213. 39. There is a natural tendency for energy to spread out. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 40. One mole of an ideal gas expands against a constant external pressure of 1 atm from a volume of 10L to 30L. Calculate the work done by the gas in Latm. A) +20. B) 40. C) -40. D) -20. Show Answer Correct Answer: D) -20. 41. As time progresses, Energy will naturally become more spread out. It can only come together if you make it. A) Second Law of Thermodynamics. B) First Law of Thermodynamics. C) Zeroth Law of Thermodynamics. D) Third Law of Thermodynamics. Show Answer Correct Answer: A) Second Law of Thermodynamics. 42. A closed system is when energy flows across the boundary. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 43. Which one of the following statements concerning heat engines is false? A) A heat engine receives heat from a hot reservoir. B) A heat engine is a device that uses heat to do work. C) Heat engines generally operate near one hundred percent efficiency. D) Part of the heat input to the engine is used to do work by the working substance within the engine. E) Part of the input heat is rejected to a cold reservoir. Show Answer Correct Answer: C) Heat engines generally operate near one hundred percent efficiency. 44. Work done is + positive when A) Work is done on the system. B) Work is done by the system. C) All the above. D) None of the above. Show Answer Correct Answer: A) Work is done on the system. 45. Releases energy (occurs spontaneously) A) Metabolism. B) Exergonic reaction. C) Photosynthesis. D) Endergonic reaction. Show Answer Correct Answer: B) Exergonic reaction. 46. Explain the concept of adiabatic processes. A) An adiabatic process occurs at constant pressure. B) An adiabatic process is a thermodynamic process with no heat exchange with the surroundings. C) An adiabatic process is a type of isothermal process. D) An adiabatic process involves heat transfer to the surroundings. Show Answer Correct Answer: B) An adiabatic process is a thermodynamic process with no heat exchange with the surroundings. 47. Who invented carnot engine A) C V Raman. B) Thomson. C) Sadi Carnot. D) Rutherford. Show Answer Correct Answer: C) Sadi Carnot. 48. In sign convention, heat is POSITIVE when heat is REJECTED from the system. Heat is NEGATIVE when heat is ABSORBED by the system. A) 1st Statement-False2nd Statement-True. B) Both Statements are False. C) 1st Statement-True2nd Statement-False. D) Both Statement are True. Show Answer Correct Answer: B) Both Statements are False. 49. Is the reaction from ATP to ADP exergonic or endergonic? A) Exergonic. B) Endergonic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Exergonic. 50. Your enthalpy is positive and your entropy is positive. What type of temperature would you want to ensure a spontaneous reaction. A) Very high. B) Very low. C) All the above. D) None of the above. Show Answer Correct Answer: A) Very high. 51. Which law of conservation of states that energy of a system may change forms, but is neither created or destroyed. A) 3rd. B) 1st. C) Zeroeth. D) 2nd. Show Answer Correct Answer: B) 1st. 52. Zeroth law of thermodynamics shows the existence of ..... ? A) Pressure. B) Heat. C) Temperature. D) Volume. Show Answer Correct Answer: C) Temperature. 53. The first law of thermodynamics, the internal energy of a system can either be increased by adding heat or doing work on the system, is a restatement of the ..... A) Law of potential energy. B) Law of heat addition. C) Law of Conservation of energy. D) Principle of entropy. Show Answer Correct Answer: C) Law of Conservation of energy. 54. A thermodynamic system where no exchange of heat takes place between system and surrounding is ..... A) Isobaric process. B) Isochoric process. C) Adiabatic process. D) Isothermal process. Show Answer Correct Answer: C) Adiabatic process. 55. Which is NOT allowed in a closed system? A) Mass flow. B) Heat added. C) Work done. D) None of the above. Show Answer Correct Answer: A) Mass flow. 56. What does the zeroth law of thermodynamics establish? A) The concept of entropy. B) The principle of energy conservation. C) The concept of temperature. D) The relation between heat and work. Show Answer Correct Answer: C) The concept of temperature. 57. In a closed system, what happens to the entropy when a gas expands? A) Entropy decreases. B) Entropy becomes zero. C) Entropy remains constant. D) Entropy increases. Show Answer Correct Answer: D) Entropy increases. 58. If a chemical reaction is spontaneous, the total entropy of the chemical systems and its surroundings ..... A) Increases only if the reaction is endothermic. B) Increases only if the reaction is exothermic. C) Always increases. D) Always decreases. Show Answer Correct Answer: C) Always increases. 59. A glass of unsweetened lemonade and ice is stirred, and the temperature is recorded as 0 $^\circ$C. An additional cube of ice at-10 $^\circ$C is added to the lemonade and ice. Which statement describes what will happen to the lemonade and ice mixture? A) It will remain at 0 $^\circ$C. B) It will cool to-10 $^\circ$C. C) It will turn completely to a solid. D) It will cool to slightly less than 0 $^\circ$C. Show Answer Correct Answer: A) It will remain at 0 $^\circ$C. 60. Which of the following is a real-world application of the second law of thermodynamics? A) A refrigerator cooling food by removing heat from inside and releasing it outside. B) A car engine converting all fuel energy into mechanical work without any loss. C) A solar panel converting sunlight into electricity with 100% efficiency. D) A perpetual motion machine that runs indefinitely without energy input. Show Answer Correct Answer: A) A refrigerator cooling food by removing heat from inside and releasing it outside. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 1Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 2Class 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books