This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If one gram of the substance is considered, the heat capacity is known as A) Free energy. B) Specific heat capacity. C) Entropy. D) Work. Show Answer Correct Answer: B) Specific heat capacity. 2. Formula for solving specific heat problems A) H = $\Delta$H x grams. B) Products-reactants. C) Q = ms$\Delta$T. D) H = $\Delta$H x moles. Show Answer Correct Answer: C) Q = ms$\Delta$T. 3. The formation 1/2 A$_{2}$ + 2 B$_{2}$ + C $\rightarrow$ CAB$_{4}$ has an enthalpy of formation of-104 kJ and a change in entropy of-60.8 J/K at 30 $^\circ$C. What is the free energy and spontaneity of the reaction? A) -18.3 kJ, not spontaneous. B) +18.3 kJ, spontaneous. C) -85.6 kJ, spontaneous. D) +85.6 kJ, not spontaneous. Show Answer Correct Answer: C) -85.6 kJ, spontaneous. 4. Cp for monaotomic gas is A) 1/2. B) 9/2. C) 5/2. D) 7/2. Show Answer Correct Answer: C) 5/2. 5. The amount of energy required to change phase of a unit mass at constant temperature. A) Heat capacity. B) Latent heat. C) Specific latent heat. D) Specific heat capacity. Show Answer Correct Answer: C) Specific latent heat. 6. What is a set of particles or interacting components that is considered a distinct physical entity called? A) A system. B) An environment. C) An engine. D) An ideal gas. Show Answer Correct Answer: A) A system. 7. For an isovolumetric process, which of the following statements is correct? A) Work, heat, and internal energy all undergo changes. B) Work and heat balance each other, so that there is no change in internal energy. C) No energy is transferred as heat; internal energy change is due to work. D) No work is done; internal energy change is due to heat. Show Answer Correct Answer: D) No work is done; internal energy change is due to heat. 8. Which law states "The entropy of a closed system is always increasing" ? A) 1st Law. B) 2nd Law. C) Zeroth Law. D) 3rd law. Show Answer Correct Answer: B) 2nd Law. 9. Your enthalpy is +20 and your entropy is +5. Which temperature will give a spontaneous reaction? A) 0. B) 4. C) 8. D) None of the above. Show Answer Correct Answer: C) 8. 10. When a system is in thermodynamic equilibrium, which of the following is true? A) The system is experiencing a phase change. B) No net change occurs in the system over time. C) The pressure in the system is not uniform. D) The system's temperature is constantly changing. Show Answer Correct Answer: B) No net change occurs in the system over time. 11. Predict the signs of $\Delta$H, $\Delta$S and $\Delta$G for the reaction:$^{ }$ Mg(s) $\rightarrow$ Mg(g) A) $\Delta$ H =-, $\Delta$ S = + and $\Delta$ G =-(all temperature). B) $\Delta$ H = +, $\Delta$ S = + and $\Delta$ G =-(At all temperature). C) $\Delta$ H = +, $\Delta$ S = + and $\Delta$ G =-(At low temperature). D) $\Delta$ H = +, $\Delta$ S = + and $\Delta$ G =-(At high temperature). Show Answer Correct Answer: D) $\Delta$ H = +, $\Delta$ S = + and $\Delta$ G =-(At high temperature). 12. N$_{2}$ + 3H$_{2}$ $\rightarrow$ 2NH$_{3}$$_{}$ How many moles of ammonium are produced when 3 moles of nitrogen react with hydrogen? A) 6 moles Ammonium. B) 9 moles hydrogen. C) 9 moles ammonium. D) 1.5 moles ammonium. Show Answer Correct Answer: A) 6 moles Ammonium. 13. It is possible to reach absolute zero A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 14. H$_{2}$ + 2 C + N$_{2 }$+ 270.3 kJ $\rightarrow$ 2 HCNIs this reaction endothermic or exothermic? A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Endothermic. 15. The amount of heat required to raise the temperature of 1g of something by 1 C, is called what? A) Heat of Formation. B) Heat of Fusion. C) Latent Heat. D) Specific Heat. Show Answer Correct Answer: D) Specific Heat. 16. Which of the following processes is an example of heat transfer by convection? A) Using a microwave oven. B) Boiling water in a pot. C) Sunlight warming the Earth. D) Touching a hot iron. Show Answer Correct Answer: B) Boiling water in a pot. 17. What is enthalpy? A) A measurement of chaos. B) The heat content of a system. C) All the above. D) None of the above. Show Answer Correct Answer: B) The heat content of a system. 18. Total amount of energy in the universe is A) Increasing. B) Decreasing. C) Constant. D) None of the above. Show Answer Correct Answer: C) Constant. 19. The SI unit of heat and energy is the ..... A) Heat. B) Watt. C) Calorie. D) Joule. Show Answer Correct Answer: D) Joule. 20. Internal energy depends on A) Only Volume. B) Only Temperature. C) Only Mass. D) Only pressure. Show Answer Correct Answer: B) Only Temperature. 21. C (diamond) $\rightarrow$ $\Delta$ A) Graphite has more energy than diamond. B) Graphite is thermodynamically more stable than diamond. C) Thermodynamic stability cannot be predicted. D) Both graphite and diamond are energetically equal. Show Answer Correct Answer: B) Graphite is thermodynamically more stable than diamond. 22. For the reaction 2H$_{2}$(g) + O$_{2}$(g) $\rightarrow$ 2H$_{2}$O(g) the bond enthalpies (in kJ/mol) are H-H = x, O=O = y, O-H = zWhich calculation will give the value, in kJ/mol, of $\Delta$H for the reaction? A) 4z-2x-y. B) 2x + y-4z. C) 2z-2x-y. D) 2x + y-2z. Show Answer Correct Answer: B) 2x + y-4z. 23. Which of the following changes increases the entropy? A) Evaporation of water. B) Freezing of water. C) Condensation of water. D) None of the above. Show Answer Correct Answer: A) Evaporation of water. 24. "When thermal energy is converted into work, some thermal energy is always transferred to the surroundings." A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. A reaction has a positive $\Delta$H and a positive $\Delta$S. Which of the following is true? A) It will be spontaneous at all temperatures. B) It will be nonspontaneous at all temperatures. C) It will be spontaneous at low temperatures. D) It will be spontaneous at high temperatures. Show Answer Correct Answer: D) It will be spontaneous at high temperatures. 26. Which statement is true regarding endothermic reactions? A) Temperature change is positive and enthalpy change is positive. B) Temperature change is positive and enthalpy change is negative. C) Temperature change is negative and enthalpy change is positive. D) Temperature change is negative and enthalpy change is negative. Show Answer Correct Answer: C) Temperature change is negative and enthalpy change is positive. 27. In physics, there is no such thing as A) Cold. B) Temperature. C) Heat. D) Energy. Show Answer Correct Answer: A) Cold. 28. In which direction does thermal energy flow? A) From light to dark. B) From hot to cold. C) Either from hot to cold or from cold to hot. D) From cold to hot. Show Answer Correct Answer: B) From hot to cold. 29. Which one of the following statements best describes a reversible process? A) All heat input into the system is converted into work during the process. B) The overall entropy of the system does not increase during the process. C) The initial and final temperatures for the process are the same. D) The entropy of the system decreases during the process. E) Statements (b) and (c) both describe a reversible process. Show Answer Correct Answer: B) The overall entropy of the system does not increase during the process. 30. The change in energy of a system equals the heat added to it plus the work done on it. A) 1st law of thermodynamics. B) 3rd law of thermodynamics. C) 2nd law of thermodynamics. D) Zeroth Law. Show Answer Correct Answer: A) 1st law of thermodynamics. 31. Which are the three means by which heat can be transferred from one environment to another? A) Conduction, compression, and refraction. B) Convection, radiation, and transformation. C) Conduction, convection, and radiation. D) Conduction, contamination, and reflection. Show Answer Correct Answer: C) Conduction, convection, and radiation. 32. Thermodynamics is the study of three E's: A) Enthalpy, Equilibrium, Engine. B) Energy, Equilibrium, Entropy. C) Energy, Equality, Engine. D) Energy, Equilibrium, Engine. Show Answer Correct Answer: B) Energy, Equilibrium, Entropy. 33. The quantity of heat absorbed or liberated in the course of a reaction is measured in terms of A) Entropy change. B) Free energy change. C) Enthalpy change. D) Change in work. Show Answer Correct Answer: C) Enthalpy change. 34. According to the Third Law of Thermodynamics, what is impossible to reach? A) Thermal equilibrium. B) Energy conservation. C) Absolute zero temperature. D) Maximum entropy. Show Answer Correct Answer: C) Absolute zero temperature. 35. Heat of combustion is always A) +ve. B) -ve. C) 0. D) None of the above. Show Answer Correct Answer: B) -ve. 36. A thermodynamic cycle must: A) Produce a work output. B) Return the system to its initial state at the end of a set of processes. C) Use the same working fluid throughout, i.e. no renewal of the fluid. D) Not allow any transfer of mass across the system boundary. Show Answer Correct Answer: B) Return the system to its initial state at the end of a set of processes. 37. Mark the correct option to complete the sentence:"Changing from gas to liquid is:" A) Solidification. B) Sublimation. C) Condensation. D) Melting. Show Answer Correct Answer: C) Condensation. 38. Define $\Delta$H A) Change in Specific Heat; Heat by one Degree Celsius. B) Change in Enthalpy; the energy/heat we calculate. C) Change in Time; time travel. D) Change in Temperature; the energy we calculate; Degree Celsius. Show Answer Correct Answer: B) Change in Enthalpy; the energy/heat we calculate. 39. For the same heat inpur and same compression ratio A) Otto cycle and Diesel cycle are equally efficient. B) Otto cycle is less efficient than diesel cycle. C) Efficiency depends mainly on working substance. D) None of the above. E) All of the above. Show Answer Correct Answer: D) None of the above. 40. What is the past participle of the word "Sing" A) Sing. B) Sang. C) Sung. D) None of the above. Show Answer Correct Answer: C) Sung. 41. 10 moles of an ideal gas expands isothermally and reversibly from a pressure of 10 atm to 2 atm at 300K. What is the largest mass that can be lifted through a height of 1m in this expansion? A) 509kg. B) 200kg. C) 409kg. D) 121kg. Show Answer Correct Answer: A) 509kg. 42. Aarav is trying to understand how a refrigerator works. The desired effect of a refrigerator is A) Heat rejection to hot body. B) Maintain cold body temperature below hot body temperature. C) Maintain hot body temperature above cold body temperature. D) None of the above. Show Answer Correct Answer: B) Maintain cold body temperature below hot body temperature. 43. The force exerted by the system on unit area of boundaries is called A) Volume. B) Density. C) Pressure. D) Viscosity. Show Answer Correct Answer: C) Pressure. 44. Which is an example of decreasing entropy in a closed system? A) Ice melting. B) Cells in a body coming together. C) Freezing water. D) Boiling water. Show Answer Correct Answer: C) Freezing water. 45. What role does activation energy play in a reaction? A) It determines the overall energy change. B) It represents the energy barrier to start a reaction. C) It governs the rate of reaction. D) It is conserved during a reaction. Show Answer Correct Answer: B) It represents the energy barrier to start a reaction. 46. A reaction must be spontaneous if it is A) Exothermic and there is an increase in entropy. B) Exothermic and there is a decrease in entropy. C) Endothermic and there is an increase in entropy. D) Endothermic and there is a decrease in entropy. Show Answer Correct Answer: A) Exothermic and there is an increase in entropy. 47. What is the second law of thermodynamics state A) Hot air always rises. B) Thermal energy always transfers to cooler objects. C) Thermal energy can be lost. D) Cold air always rises. Show Answer Correct Answer: B) Thermal energy always transfers to cooler objects. 48. State function has definite value for each state A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 49. The laws of thermodynamics describes the relationship between ..... and energy and how they relate to temperature and ..... A) Energy, heat. B) Mass, heat. C) Entropy, energy. D) Matter, entropy. Show Answer Correct Answer: D) Matter, entropy. 50. Temperature is a measure of average [blank] energy of individual atoms. A) Heat. B) Potential. C) Kinetic. D) Mechanical. Show Answer Correct Answer: C) Kinetic. 51. A process which causes a decrease in entropy is A) Condensation of steam to form liquid water. B) Vaporization of liquid water to form steam. C) Dissociation of solid sodium chloride into aqueous sodium cations and chloride anions. D) Sublimation of snow to water vapor. Show Answer Correct Answer: A) Condensation of steam to form liquid water. 52. This refers to the energy gained by an object due to its momentum. Also known as energy in motion A) Potential Energy. B) Internal Energy. C) Weight. D) Kinetic Energy. Show Answer Correct Answer: D) Kinetic Energy. 53. How much heat is lost when a 64 g piece of copper cools from 375oC, to 26oC? (The specific heat of copper is 0.38452 J/g xoC) A) 8588.63 J. B) -3845.2 J. C) -1500.86 J. D) -8588.63 J. Show Answer Correct Answer: D) -8588.63 J. 54. Mercury thermometers work based on the principal of ..... A) Thermal equilibrium. B) Specific heat capacity. C) Thermal expansion. D) Thermodynamics. Show Answer Correct Answer: C) Thermal expansion. 55. The total energy of a system equals A) Its heat and temperature. B) Its work and temperature. C) Its heat and work. D) Its heat. Show Answer Correct Answer: C) Its heat and work. 56. Heat is ..... if heat is removed from a system A) Positive. B) Negative. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Negative. 57. What is the efficiency of the machine if the input is 263 J and a the useful output is 142 J? A) 6.26%. B) 54%. C) 100%. D) 260%. Show Answer Correct Answer: B) 54%. 58. Density is equal to A) Mass / gravity. B) Mass x acceleration due to graviy. C) Volume / Mass. D) Mass / Volume. Show Answer Correct Answer: D) Mass / Volume. 59. What is a thermodynamic system? Give examples. A) A thermodynamic system is a type of engine that converts heat into work. B) A thermodynamic system is a defined region where thermodynamic processes occur. Examples include a gas in a piston, a boiling pot of water, and a thermos bottle. C) Examples of thermodynamic systems include a refrigerator and a light bulb. D) A thermodynamic system is only applicable to liquids and not gases. Show Answer Correct Answer: B) A thermodynamic system is a defined region where thermodynamic processes occur. Examples include a gas in a piston, a boiling pot of water, and a thermos bottle. 60. Is liquid water freezing at a temperature below its freezing point a spontaneous or nonspontaneous process? A) Spontaneous. B) Nonspontaneous. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nonspontaneous. ← 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