This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How does a catalyst affect the reaction rate? A) By increasing the activation energy. B) By lowering the activation energy. C) By increasing the concentration of reactants. D) By decreasing the concentration of products. Show Answer Correct Answer: B) By lowering the activation energy. 2. What is the significance of the second law of thermodynamics in determining the efficiency of heat engines? A) It allows heat engines to operate at 100% efficiency. B) It sets a limit on the maximum efficiency of heat engines. C) It has no impact on the efficiency of heat engines. D) It allows heat engines to operate without any energy loss. Show Answer Correct Answer: B) It sets a limit on the maximum efficiency of heat engines. 3. 2nd law of thermodynamics A) Every time energy changes form, some of it is lost to the environment. B) Energy can't be created or destroyed. C) All energy generates heat. D) None of the above. Show Answer Correct Answer: A) Every time energy changes form, some of it is lost to the environment. 4. Intensive property of a system is one whose value A) Depends on the mass of the system, like volume. B) Does not depend on the mass of the system, like temperature, pressure, etc. C) Is not dependent on the path followed but on the state. D) Is dependent on the path followed and not on the state. Show Answer Correct Answer: B) Does not depend on the mass of the system, like temperature, pressure, etc. 5. During systole stage ventricles of heart contracts. A) Adiabatic. B) Isobaric. C) Isothermal. D) Isovolumetric. Show Answer Correct Answer: D) Isovolumetric. 6. What must occur for the natural flow of heat to be reversed? A) Work. B) Kinetic Energy. C) Create energy. D) Temperature Conversion. Show Answer Correct Answer: A) Work. 7. Water in stoppered bottle is an example for A) Open system. B) Isolated system. C) Homogeneous system. D) Closed system. Show Answer Correct Answer: D) Closed system. 8. True or False:Entropy increases as temperature increases A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. Work is high grade and heat is low grade energy A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. Temperature is ..... property A) Intensive property. B) Extensive property. C) All the above. D) None of the above. Show Answer Correct Answer: A) Intensive property. 11. As a system becomes more disordered, entropy A) Remains the same. B) Decreases. C) Increases. D) Cannot be determined. Show Answer Correct Answer: C) Increases. 12. The scientist pours liquid nitrogen on the camera. What does the camera detect? A) It detects cold energy, which has more energy than heat energy. B) Nothing, because cold things don't generate heat. C) It breaks the camera instantly. D) It detects thermal energy, because even cold things have some heat energy. Show Answer Correct Answer: D) It detects thermal energy, because even cold things have some heat energy. 13. How does the zeroth law of thermodynamics define thermal equilibrium? A) Two systems not in thermal equilibrium with a third system are in thermal equilibrium with each other. B) Two systems in thermal equilibrium with each other have different temperatures. C) Two systems in thermal equilibrium with a third system are in thermal equilibrium with each other. D) Two systems in thermal equilibrium with each other have the same temperature. Show Answer Correct Answer: C) Two systems in thermal equilibrium with a third system are in thermal equilibrium with each other. 14. What is a nonspontaneous 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: B) A reaction that requires energy input. 15. What is the value of the absolute thermodynamic temperature scale? A) 0K. B) 3K. C) 4K. D) 1K. Show Answer Correct Answer: A) 0K. 16. What is the second law of thermodynamics? A) Heat flows from cold to hot spontaneously. B) Energy cannot be created or destroyed. C) The total energy of a closed system remains constant. D) The total entropy of an isolated system always increases over time. Show Answer Correct Answer: D) The total entropy of an isolated system always increases over time. 17. Kelvin scale starts from A) 183. B) 293. C) 173. D) 273. Show Answer Correct Answer: D) 273. 18. In a reversible adiabatic process, entropy A) Increases. B) Decreases. C) Remains unchanged. D) None of these. Show Answer Correct Answer: C) Remains unchanged. 19. Which of the following best describes the concept of thermal equilibrium? A) Two objects at different temperatures exchange heat until they reach the same temperature. B) Two objects at the same temperature exchange heat until one becomes hotter. C) Two objects exchange heat indefinitely without reaching the same temperature. D) Two objects do not exchange heat at all. Show Answer Correct Answer: A) Two objects at different temperatures exchange heat until they reach the same temperature. 20. The first law of thermodynamics is also known as ..... A) Law of conservation of heat. B) Law of conservation of energy. C) Law of conservation of work. D) Law of conservation of volume. Show Answer Correct Answer: B) Law of conservation of energy. 21. Select the most random system of the following: A) Sugar cubes in a box. B) Finely powdered sugar. C) Sugar dissolved in water. D) Sugar cubes scattered on a table. Show Answer Correct Answer: C) Sugar dissolved in water. 22. Step two in Carnot engine is A) Isothermal expansion. B) Adiabatic expansion. C) Isothermal compression. D) Adiabatic compression. Show Answer Correct Answer: B) Adiabatic expansion. 23. A change in state function is indicated by prefixing the symbol A) $\Delta$. B) $\delta$. C) $\alpha$. D) $\Lambda$. Show Answer Correct Answer: A) $\Delta$. 24. $\left(\frac{\partial T}{\partial V}\right)_{\mathrm{s}}$ A) $\left(\frac{\partial\mathrm{P}}{\partial S}\right)_{\mathrm{V}}$. B) $\left(\frac{\partial V}{\partial S}\right)_{\mathrm{P}}$. C) $-\left(\frac{\partial\mathrm{P}}{\partial S}\right)_{\mathrm{V}}$. D) $-\left(\frac{\partial V}{\partial S}\right)_{\mathrm{P}}$. Show Answer Correct Answer: C) $-\left(\frac{\partial\mathrm{P}}{\partial S}\right)_{\mathrm{V}}$. 25. Energy can be converted from one form to another with the interaction of heat, work and internal energy, but it cannot be created nor destroyed, under any circumstances. A) Third Law of Thermodynamics. B) First Law of Thermodynamics. C) Zeroth Law of Thermodynamics. D) Second Law of Thermodynamics. Show Answer Correct Answer: B) First Law of Thermodynamics. 26. A thermometer measures temperature which is best described as A) Specific heat of a substance. B) Calorimetry experiment. C) Heat movement of particles. D) Average kinetic energy of particles. Show Answer Correct Answer: D) Average kinetic energy of particles. 27. Which process involves the transfer of heat between objects by direct contact? A) Entropy. B) Convection. C) Radiation. D) Conduction. Show Answer Correct Answer: D) Conduction. 28. Heat spontaneously flowing from a cold body to a hot body violates the ..... A) 2nd law of thermodynamics. B) 1st law of thermodynamics. C) Law of conservation of energy. D) Kinetic-molecular law. Show Answer Correct Answer: A) 2nd law of thermodynamics. 29. How much heat is needed to form 82.14 g of NO$_{2}$? N$_{2}$+ 2O$_{2}$ $\rightarrow$ 2NO$_{2}$$\Delta$H = +67kJ A) 119.6. B) 58.2 kJ. C) 59.8. D) 29.1. Show Answer Correct Answer: C) 59.8. 30. Thermodynamics is not concerned about A) The feasibility of a chemical reaction. B) Energy changes involved in a chemical reaction. C) The rate at which a reaction proceeds. D) The extent to which a chemical reaction proceeds. Show Answer Correct Answer: C) The rate at which a reaction proceeds. 31. Identify the incorrect statement among the following.-A:Standard enthalpy of formation is the enthalpy change when one mole of a compound is formed from its elements in their standard states.-B:The standard enthalpy of formation for a pure element in its standard state is always zero.-C:Standard enthalpy of formation values are always positive since they involve bond formation. A) A. B) B. C) C. D) None of the above. Show Answer Correct Answer: C) C. 32. Quasi-static process A) Is infinitely slow process. B) Experiences thermodynamic equilibrium at every small point on its path. C) Reversible process. D) All of the above. Show Answer Correct Answer: D) All of the above. 33. Considering the relationship Tds=dU+pdV between the entropy (S), internal energy (U), pressure (p), temperature (T) and volume (V), which of the statement is correct. A) For an irreversible process TdSdU+pdV. B) It is applicable only for a reversible process. C) It is equivalent to 1$^{st}$ law, for a reversible process. D) It is valid only for an ideal gas. Show Answer Correct Answer: C) It is equivalent to 1$^{st}$ law, for a reversible process. 34. Which law concentrates on the conservation of energy? A) 4th. B) 2nd. C) 1st. D) 3rd. Show Answer Correct Answer: C) 1st. 35. A) A process in which volume remain constant is called A) Isobaric process. B) Isochoric process. C) Isothermal process. D) Adiabatic process. Show Answer Correct Answer: B) Isochoric process. 36. Energy of motion is which type of energy? A) Gravitational. B) Sound. C) Potential. D) Kinetic. Show Answer Correct Answer: D) Kinetic. 37. For thermodynamic equilibrium to exist which should exist A) Thermal equilibrium. B) Chemical equilibrium. C) Mechanical equilibrium. D) All should exist. Show Answer Correct Answer: D) All should exist. 38. What does the second law of thermodynamics primarily concern? A) Conservation of energy. B) Directionality of heat transfer. C) Relationship between pressure and volume. D) Behavior of ideal gases. Show Answer Correct Answer: B) Directionality of heat transfer. 39. Consider the reaction:2 H$_{2}$O + energy $\rightarrow$ 2H$_{2}$ + O$_{2}$ A) Exothermic, absorbing energy. B) Exothermic, releasing energy. C) Endothermic, absorbing energy. D) Endothermic, releasing energy. Show Answer Correct Answer: C) Endothermic, absorbing energy. 40. Which of the following is a state function? A) Work. B) Heat. C) Enthalpy. D) Pressure. Show Answer Correct Answer: C) Enthalpy. 41. Two systems are said to be in the state of thermal equilibrium if they have A) Same area. B) Same size. C) Same shape. D) Same temperature. Show Answer Correct Answer: D) Same temperature. 42. In which process, the indicator diagram is a straight line? A) Isobaric. B) Isothermal. C) Irreversible. D) Adiabatic. Show Answer Correct Answer: A) Isobaric. 43. Which law (the most important one) states that heat naturally flows from a higher concentration to a lower concentration. A) 3rd. B) 1st. C) 2nd. D) Zeroeth. Show Answer Correct Answer: C) 2nd. 44. Which is an example of a closed system? A) Ocean. B) Heat exchangers. C) Calorimeter. D) None of the above. Show Answer Correct Answer: C) Calorimeter. 45. If the temperature of the source is increased, the efficiency of carnot heat engine A) Decreases. B) Remains constant. C) Increases. D) First increases then becomes constant. Show Answer Correct Answer: C) Increases. 46. In thermodynamic system, this refers to the external environment A) Boundary. B) Matter. C) Surroundings. D) System. Show Answer Correct Answer: C) Surroundings. 47. For a process to be 100% efficient, which of the following would need to happen regarding entropy? A) Entropy must increase. B) Entropy must decrease. C) Entropy must remain constant. D) Entropy must be zero. Show Answer Correct Answer: C) Entropy must remain constant. 48. Which of the following is the basis of temperature measurement? A) First law of thermodynamics. B) Third law of thermodynamics. C) Second law of thermodynamics. D) Zeroth law of thermodynamics. Show Answer Correct Answer: D) Zeroth law of thermodynamics. 49. PMM3 is related to A) Work. B) Friction. C) Flow. D) Heat. Show Answer Correct Answer: B) Friction. 50. In which of the following processes, a maximum increase in entropy is observed? A) Sublimation of Naphthalene. B) Condensation of Water. C) Dissolution of Salt in Water. D) Melting of Ice. Show Answer Correct Answer: A) Sublimation of Naphthalene. 51. Which of the following processes is an example of an isothermal process in thermodynamics? A) Cooling a hot metal rod in air. B) Melting of ice at 0$^\circ$C. C) Compressing a gas in an insulated cylinder. D) Heating water from 25$^\circ$C to 100$^\circ$C. Show Answer Correct Answer: B) Melting of ice at 0$^\circ$C. 52. What heating system is most common in newer homes? A) Forced air. B) Convection. C) A Radiator. D) Electrical. Show Answer Correct Answer: A) Forced air. 53. Which represents a decrease in entropy? A) Condensation of steam on cold glass. B) Boiling water. C) Sublimation of CO$_{2}$. D) NaCl dissolving in water. Show Answer Correct Answer: A) Condensation of steam on cold glass. 54. What is not true for a cyclic process? A) The system returns to its initial state. B) $\Delta$U = 0. C) Q = W. D) W = 0. Show Answer Correct Answer: D) W = 0. 55. Which equation represents Hess's Law? A) $\Delta$H = $\sigma$$\Delta$Hf(products)-$\sigma$$\Delta$Hf(reactants). B) $\Delta$H = q + W. C) $\Delta$H = mc$\Delta$T. D) $\Delta$H = $\Delta$S-$\Delta$G. Show Answer Correct Answer: A) $\Delta$H = $\sigma$$\Delta$Hf(products)-$\sigma$$\Delta$Hf(reactants). 56. Enthalpy of sublimation is = A) Enthalpy of fusion+Enthalpy of vaporisation. B) Enthalpy of Vaporisation. C) Enthalpy of fusion. D) Twice the enthalpy of vaporisation. Show Answer Correct Answer: A) Enthalpy of fusion+Enthalpy of vaporisation. 57. Amount of heat needed to raise the temperature of 1kg of a material. A) Heat. B) Thermal energy. C) Temperature. D) Specific heat. E) Solar collector. Show Answer Correct Answer: D) Specific heat. 58. Which of the following is not a scale used to measure temperature? A) Celsius. B) Thermodynamic. C) Fahrenheit. D) Kelvin. Show Answer Correct Answer: B) Thermodynamic. 59. What is internal energy? A) The amount of heat an object contains. B) The sum of the kinetic and potential energy of the particles of a substance. C) Something we can measure easily. D) Something that does not exist. Show Answer Correct Answer: B) The sum of the kinetic and potential energy of the particles of a substance. 60. According to the third law of thermodynamics, what happens to the entropy of a perfect crystal as the temperature approaches absolute zero? A) Entropy remains constant. B) Entropy becomes negative. C) Entropy becomes infinite. D) Entropy becomes zero. Show Answer Correct Answer: D) Entropy becomes zero. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books