This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 19 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The second law of thermodynamics introduces the concept of A) Entropy. B) Heat. C) Temperature. D) Internal energy of the system. Show Answer Correct Answer: A) Entropy. 2. Second law of theromodynamics defines A) Heat. B) Internal energy. C) Enthalpy. D) Entropy. E) Work. Show Answer Correct Answer: D) Entropy. 3. I can't be created nor destroyed. What am I? A) Air. B) A unicorn. C) Energy. D) Nothi. Show Answer Correct Answer: C) Energy. 4. The type of system that can exchange mass and energy, usually in the form of heat with its surroundings. A) Isolated system. B) Open system. C) Closed system. D) None of the above. Show Answer Correct Answer: B) Open system. 5. What is a spontaneous reaction? A) A reaction that occurs quickly. B) A reaction that requires energy input. C) A reaction that occurs naturally without external intervention. D) A reaction that produces a large amount of heat. Show Answer Correct Answer: C) A reaction that occurs naturally without external intervention. 6. Calculate the number of kJ required for the reaction shown below, if you begin with 24 grams of oxygen (O2) and the $\Delta$Hrxn = +180 kJ. N2(g) + 2 O2(g) $\rightarrow$ 2 NO2(g) A) 70 kJ. B) 270 kJ. C) 170 kJ. D) 0.7 kJ. Show Answer Correct Answer: A) 70 kJ. 7. Is this phase change representing an exothermic or endothermic reaction?GAS to LIQUID A) Exothermic. B) Endothermic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Exothermic. 8. Joule Thomson coff. for ideal gas is A) 1. B) 0. C) More than 0. D) Less than 0. Show Answer Correct Answer: B) 0. 9. According to the first law of thermodynamics, what is the principle it states? A) Entropy always increases in an isolated system. B) Heat flows from a higher temperature to a lower temperature. C) Energy cannot be created nor destroyed. D) Energy can only be transferred as heat. Show Answer Correct Answer: C) Energy cannot be created nor destroyed. 10. Six molecules have the following speeds:2m/s, 5m/s, 3 m/s, 6m/s, 3m/s, and 5m/s respectively. Find the rms speed. A) 5m/s. B) 1.7m/s. C) 4.2m/s. D) 4m/s. Show Answer Correct Answer: C) 4.2m/s. 11. The absolute zero pressure will be A) Under vacuum conditions. B) When molecular momentum of the system becomes zero. C) At sea level. D) At a temperature of-273.15 K. Show Answer Correct Answer: B) When molecular momentum of the system becomes zero. 12. Particles (molecules) in a ..... have less energy than the other states of matter. A) Gas. B) Solid. C) Liquid. D) None of the above. Show Answer Correct Answer: B) Solid. 13. Whenever heat is added to a system, it transforms to an equal amount of some other form of energy describes which law of thermodynamics? A) 1st Law of thermodynamics. B) 2nd Law of thermodynamics. C) 4th Law of thermodynamics. D) 3rd Law of thermodynamics. Show Answer Correct Answer: A) 1st Law of thermodynamics. 14. A process is spontaneous due to: A) Infinitely small gradient. B) Finite gradient. C) All the above. D) None of the above. Show Answer Correct Answer: B) Finite gradient. 15. A refrigerator is A) An air cooler. B) An electric motor. C) A heat engine. D) A heat engine working in the reverse order. Show Answer Correct Answer: D) A heat engine working in the reverse order. 16. Consider the following two processes; I. A heat source at 1200 K loses 2500kJ of heat to a sink at 800 KII. A heat source at 800 K loses 2000 kJ of heat to a sink at 500 Kwhich of the following statement is true? A) Process I is more irreversible than process II. B) Process II is more irreversible than process I. C) Irreversibility associated in both the processes are equal. D) Both the process are reversible. Show Answer Correct Answer: B) Process II is more irreversible than process I. 17. What does the First Law of Thermodynamics state about energy in a closed system? A) Energy within a closed system remains constant over time. B) Energy can neither be created nor destroyed, only transformed from one form to another. C) Energy can be created but not destroyed. D) Energy is always lost when work is done. Show Answer Correct Answer: B) Energy can neither be created nor destroyed, only transformed from one form to another. 18. True/False:Heat is a type of energy A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. A measure of the amount of disorder or randomness in a system. A) First Law of Thermodynamics. B) Exothermic. C) Heat engine. D) Entropy. Show Answer Correct Answer: D) Entropy. 20. The gaseous layer which protects human life from on earth uv radiation is A) Oxygen. B) Ozone. C) Carbondioxide. D) Nitrogen. Show Answer Correct Answer: B) Ozone. 21. What is the significance of the phase diagram in thermodynamics? A) It shows only the temperature of a substance. B) The phase diagram is significant as it illustrates the relationships between temperature, pressure, and the phases of a substance, aiding in the prediction of phase behavior. C) It is used solely for calculating energy levels of substances. D) It predicts the exact time a phase change will occur. Show Answer Correct Answer: B) The phase diagram is significant as it illustrates the relationships between temperature, pressure, and the phases of a substance, aiding in the prediction of phase behavior. 22. The equation of state for n moles of an ideal gas is PV=nRT, where R is a constant. The SI units for R are the following: A) J/mol. B) J/(mol x K). C) (J x mol)/K. D) J/K. Show Answer Correct Answer: B) J/(mol x K). 23. What is the meaning of open system? A) Only heat transfer across boundary. B) Only mass transfer across boundary. C) Heat & mass transfer across boundary. D) No heat & mass transfer across boundary. Show Answer Correct Answer: C) Heat & mass transfer across boundary. 24. In a thermodynamic cycle, which of the following statements is true about the net work done by the system? A) It is always zero. B) It is equal to the entropy change. C) It is equal to the change in internal energy. D) It is equal to the net heat added to the system. Show Answer Correct Answer: D) It is equal to the net heat added to the system. 25. Which powder produced the greatest temperature decrease? A) NaCl. B) NH4NO3. C) CaCl2. D) KCl. Show Answer Correct Answer: B) NH4NO3. 26. System A is in equilibrium with system C.System B is in equilibrium with system C.System A is in equilibrium with system B according to which law of thermodynamics? A) Third Law of Thermodynamics. B) First Law of Thermodynamics. C) Zeroth Law of Thermodynamics. D) Second Law of Thermodynamics. Show Answer Correct Answer: C) Zeroth Law of Thermodynamics. 27. Efficiency is a ..... of what you put in versus what you get out of a system. A) Source. B) Multiplication. C) Ratio. D) Addition. Show Answer Correct Answer: C) Ratio. 28. Which would have more entropy? A) Frozen ice cream. B) Liquid Ice cream. C) All the above. D) None of the above. Show Answer Correct Answer: B) Liquid Ice cream. 29. State the second law of thermodynamics. A) Heat flows from cold to hot spontaneously. B) Energy cannot be created or destroyed. C) The total entropy of an isolated system always increases over time. D) The total energy of an isolated system remains constant. Show Answer Correct Answer: C) The total entropy of an isolated system always increases over time. 30. If a refrigerator is having COP of 1.5 then the Heat pump working between same temperature limits will have COP A) 2.5. B) 1.5. C) 1. D) 2. Show Answer Correct Answer: A) 2.5. 31. Which of the following are ways in which energy can be transferred to or from a substance? A) Heat and internal energy. B) Work and internal energy. C) Heat and work. D) Heat and kinetic energy. Show Answer Correct Answer: C) Heat and work. 32. Chemical reactions are ..... processes A) Adiabiatic. B) Isotopic. C) Isothermal. D) Isobaric. Show Answer Correct Answer: D) Isobaric. 33. Internal energy of the system is sum of its A) Kinetic and elastic energy. B) Kinetic and potential energy. C) Electric and mechanical energy. D) Light and heat energy. Show Answer Correct Answer: B) Kinetic and potential energy. 34. The form of energy transfer that takes place in a house heated by forced air is primarily ..... A) Induction. B) Radiation. C) Conduction. D) Convection. Show Answer Correct Answer: D) Convection. 35. Heat flow from a cool body to a hot body would not violate the 1st Law, energy would be still conserved A) True. B) Maybe. C) Sometimes. D) False. Show Answer Correct Answer: A) True. 36. If a system undergoes contraction of volume, then the work done by system is: A) Zero. B) Negligible. C) Negative. D) Positive. Show Answer Correct Answer: C) Negative. 37. Which of the following is NOT a path function? A) Internal energy. B) Heat energy. C) Work energy. D) None of the above. Show Answer Correct Answer: A) Internal energy. 38. Gamma cp/cv is equal to A) (1+n/2). B) (1+2/n). C) (1+n/1). D) (1+1/n). Show Answer Correct Answer: B) (1+2/n). 39. As the temperature of a fluid decreases- A) The number of inter-particle collisions and random movement of particles decrease. B) The number of inter-particle collisions and random movement of particles increase. C) The number of inter-particle collisions increase and random movement of particles decrease. D) The number of inter-particle collisions decrease and random movement of particles increase. Show Answer Correct Answer: A) The number of inter-particle collisions and random movement of particles decrease. 40. Which of the following is an example of the First Law of Thermodynamics in daily life? A) An ice cube melting at room temperature. B) Riding a bicycle and converting chemical energy into mechanical energy. C) Cooling atoms to extremely low temperatures. D) Using a thermometer to measure temperature. Show Answer Correct Answer: B) Riding a bicycle and converting chemical energy into mechanical energy. 41. Which of the following processes is an example of an endothermic reaction? A) Combustion of gasoline. B) Photosynthesis in plants. C) Freezing of water. D) Condensation of steam. Show Answer Correct Answer: B) Photosynthesis in plants. 42. In which of the following reactions/phase changes do you expect to have a decrease in entropy? A) HF(l) $\rightarrow$HF(g). B) 4Fe(s) +3O$_{2}$(g)$\rightarrow$2Fe$_{2}$O$_{3}$(s). C) Fe(s) $\rightarrow$Fe(l). D) H$_{2}$O$_{2}$(l) $\rightarrow$2H$_{2}$O(l) +O$_{2}$(g). Show Answer Correct Answer: B) 4Fe(s) +3O$_{2}$(g)$\rightarrow$2Fe$_{2}$O$_{3}$(s). 43. Which of the following systems where the work is not performed on or by the system nor is heat extracted or added to the system? A) Open system. B) Closed system. C) Isolated system. D) None of the above. Show Answer Correct Answer: C) Isolated system. 44. The 2nd Law of Thermodynamics tells us ..... A) Heat flows from cold to hot. B) Heat flows randomly, it's a 50/50 coin flip. C) Heat doesn't flow, temperature flows. D) Heat flows from hot to cold. Show Answer Correct Answer: D) Heat flows from hot to cold. 45. A sample of iron receives 50.J of heat energy that raises the temperature of the iron by 25.0$^\circ$C. If iron has a specific heat of 0.10 J/g$^\circ$C, what is the mass of the iron sample? (show your work) A) 30g. B) 25g. C) 20g. D) 50g. Show Answer Correct Answer: C) 20g. 46. The species which by definition has ZERO standard molar enthalpy of formation at 298 K is: A) Cl2(g). B) CH4(g). C) Br2(g). D) H2O(g). Show Answer Correct Answer: A) Cl2(g). 47. A material through which thermal energy moves slowly. A) Gas. B) Internal combustion engine. C) Solar collector. D) Thermal insulator. E) Conductor. Show Answer Correct Answer: D) Thermal insulator. 48. Process is method change the value of A) Pressure. B) Volume. C) Temperature. D) All. Show Answer Correct Answer: D) All. 49. Warm air rises and cold air sinks demonstrates what? A) Convection. B) Refrigeration. C) Conduction. D) Radiation. Show Answer Correct Answer: A) Convection. 50. Heat will not flow between two objects in thermal equilibrium. A) Zeroth law of thermodynamics. B) First law of thermodynamics. C) All the above. D) None of the above. Show Answer Correct Answer: A) Zeroth law of thermodynamics. 51. ..... is an intensive property A) Temperature. B) Entropy. C) Volume. D) Area. Show Answer Correct Answer: A) Temperature. 52. C (diamond) $\rightarrow$ C ( graphite), $\Delta$ A) Graphite has more energy than diamond. B) Graphite is more stable than diamond. C) Stability cannot be predicted. D) None of the above. Show Answer Correct Answer: B) Graphite is more stable than diamond. 53. The total energy of all the particles in a substance is called: A) Mass. B) Degrees. C) Temperature. D) Thermal energy. Show Answer Correct Answer: D) Thermal energy. 54. Which law of thermodynamics is applicable to the thermometer? A) Second. B) Third. C) First. D) Zeroth. Show Answer Correct Answer: D) Zeroth. 55. Heat does not spontaneously flow from a colder body to a hotter one. Which of the following thermodynamics law states this? A) First law of thermodynamics. B) Zeroth law of thermodynamics. C) Second law of thermodynamics. D) Third law of thermodynamics. Show Answer Correct Answer: C) Second law of thermodynamics. 56. What does the second law of thermodynamics imply about the direction of heat transfer? A) Heat flows from hot to cold spontaneously. B) Heat flows from cold to hot spontaneously. C) Heat can flow from hot to cold with no work done. D) Heat can flow from cold to hot with no work done. Show Answer Correct Answer: A) Heat flows from hot to cold spontaneously. 57. What is the significance of the Gibbs free energy? A) Gibbs free energy determines the color of a chemical reaction. B) Gibbs free energy is used to calculate the density of a substance. C) Gibbs free energy measures temperature changes in a system. D) Gibbs free energy indicates the spontaneity of a process and the maximum reversible work obtainable from a system. Show Answer Correct Answer: D) Gibbs free energy indicates the spontaneity of a process and the maximum reversible work obtainable from a system. 58. Entropy is often called "time's arrow" because A) Trying to understand entropy hurts as much as being struck by an arrow. B) Macropscopic processes evolve toward a specific energy configuration and never evolve away from that configuration. C) All the above. D) None of the above. Show Answer Correct Answer: B) Macropscopic processes evolve toward a specific energy configuration and never evolve away from that configuration. 59. What will be the minimum amount of work required to operate a refrigerator machine which removes 4.2 Kj of heat at 273 K and rejects it at 323 K. A) 100 joules. B) 500 Joules. C) 650 Joules. D) 200 Joules. Show Answer Correct Answer: C) 650 Joules. 60. Which phase of matter has the greatest motion and least orderly arrangement? A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: C) Gas. ← 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