This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 18 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How does the concept of friction determine the direction of time? A) Friction decreases the entropy of a system. B) Friction creates energy. C) Friction causes motion of a system to slow. D) None of the above. Show Answer Correct Answer: C) Friction causes motion of a system to slow. 2. Define Exothermic A) Energy is released; $\Delta$H is positive; Going from Solid to Liquid, Liquid to Gas. B) Energy is absorbed; $\Delta$H is positive; Going from Gas to Liquid, Liquid to Solid. C) Energy is absorbed; $\Delta$H is negative; Going from Gas to Liquid, Liquid to Solid. D) Energy is released; $\Delta$H is negative; Going from Gas to Liquid, Liquid to Solid. Show Answer Correct Answer: D) Energy is released; $\Delta$H is negative; Going from Gas to Liquid, Liquid to Solid. 3. Boiling point of water in Celsius: A) 100. B) 32. C) 212. D) 0. Show Answer Correct Answer: A) 100. 4. In our equations, what does "$\Delta$T" represent? A) Change in temperature. B) Mass. C) Latent heat. D) Specific heat. Show Answer Correct Answer: A) Change in temperature. 5. Thermal energy transfer through the movement of hot and cold air in a circular motion is A) Conduction. B) Science. C) Radiation. D) Convection. Show Answer Correct Answer: D) Convection. 6. Which of the following is always a characteristic of an adiabatic process? A) No heat flows into or out of the system (Q = 0). B) The internal energy does not change ($\Delta$U = 0). C) The pressure does not change ($\Delta$P = 0). D) No work is done on or by the system (W = 0). E) The temperature does not change ($\Delta$T = 0). Show Answer Correct Answer: A) No heat flows into or out of the system (Q = 0). 7. Entropy remains constant in A) Isothermal process. B) Isochoric process. C) Isolated process. D) Adiabatic process. Show Answer Correct Answer: D) Adiabatic process. 8. For endothermic reaction $\Delta$ A) Positive. B) Negative. C) All the above. D) None of the above. Show Answer Correct Answer: A) Positive. 9. An energy interaction is ..... , if its driving force is a temperature difference A) Heat transfer. B) Work transfer. C) Restricted. D) None of the above. Show Answer Correct Answer: A) Heat transfer. 10. The entropy of an isolated system can never ..... A) Decrease. B) Be zero. C) Increase. D) None of the mentioned. Show Answer Correct Answer: A) Decrease. 11. Which of the following best describes the concept of enthalpy in thermodynamics? A) The total energy of a system, including both internal energy and the energy required to make room for it by displacing its environment. B) The measure of disorder or randomness in a system. C) The energy transferred between systems due to temperature difference. D) The energy required to change the temperature of a unit mass by 1$^\circ$C. Show Answer Correct Answer: A) The total energy of a system, including both internal energy and the energy required to make room for it by displacing its environment. 12. In Carnot cycle ..... processes are there A) 3. B) 4. C) 5. D) None of the above. Show Answer Correct Answer: B) 4. 13. A 0.10 kg ball falls 10.m onto a hard floor and then bounces back up to 9.0m. How much of its transformed to the internal energy of the ball and the floor? A) 0.89 J. B) 0J. C) 0.78 J. D) 0.98 J. Show Answer Correct Answer: D) 0.98 J. 14. No work is done on or by the system A) Adiabatic. B) Isovolumetric. C) Isothermal. D) Isolated System. Show Answer Correct Answer: B) Isovolumetric. 15. Which law of thermodynamics states that energy cannot be created or destroyed? A) Zeroth Law. B) Second Law. C) Third Law. D) First Law. Show Answer Correct Answer: D) First Law. 16. Identify whether the following result in an increase or decrease in entropy:3 moles of gas (on reactant side) $\rightarrow$ 6 moles of gas (product) A) Increase. B) Decrease. C) All the above. D) None of the above. Show Answer Correct Answer: A) Increase. 17. Which one of these would result in a decrease in entropy? A) A liquid freezes. B) A liquid boils. C) A solid solute dissolves in water. D) A gas is released. Show Answer Correct Answer: A) A liquid freezes. 18. The second law of thermodynamics states that A) The entropy of the universe is constant. B) The energy of the universe is constant. C) The entropy of a perfect crystal is zero at O K. D) The entropy of the universe is increasing. Show Answer Correct Answer: D) The entropy of the universe is increasing. 19. Where does the energy released in a chemical reaction come from? A) It is created. B) It comes from the kinetic energy of the moving particles. C) It comes from the potential energy stored in chemical bonds. D) None of the above. Show Answer Correct Answer: C) It comes from the potential energy stored in chemical bonds. 20. The symbol for specific latent heat is A) M. B) $l$. C) C. D) Q. Show Answer Correct Answer: B) $l$. 21. What is the work output of a machine that has a work input of 2, 800 Joules and an efficiency of 92.3%? A) 2, 690J. B) 92.3J. C) 2, 584.4. D) 0.0082J. Show Answer Correct Answer: C) 2, 584.4. 22. Which law states "Energy can neither be created nor destroyed. It can only be transformed" ? A) Zeroth Law. B) 2nd Law. C) 1st Law. D) 3rd law. Show Answer Correct Answer: C) 1st Law. 23. The specific heat of aluminum is 0.9025 J/g$^\circ$C. How much heat is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0$^\circ$ to 50.0$^\circ$? A) 451 J. B) 554 J. C) -451 J. D) -554 J. Show Answer Correct Answer: C) -451 J. 24. What is the molar heat capacity in an adiabatic process? A) Zero. B) 10. C) 100. D) Infinity. Show Answer Correct Answer: A) Zero. 25. What are the units for Heat (Q)? A) C or K. B) G or kg. C) Cal/g C or J/kg K. D) Cal or J. Show Answer Correct Answer: D) Cal or J. 26. According to kinetic theory of heat A) Temperature should rise during boiling. B) Temperature should fall during freezing. C) At low temperature all bodies are in solid state. D) At absolute zero there is absolutely no vibration of molecules. E) None of the above. Show Answer Correct Answer: D) At absolute zero there is absolutely no vibration of molecules. 27. What happens to the entropy of an isolated system over time, according to the Second Law of Thermodynamics? A) It decreases. B) It fluctuates. C) It remains constant. D) It increases. Show Answer Correct Answer: D) It increases. 28. If work is done by the system, the energy of the system decreases, work is taken as ..... A) -w. B) +w. C) All the above. D) None of the above. Show Answer Correct Answer: A) -w. 29. The second law of thermodynamics states that in any energy exchange, if no energy enters or leaves the system, the potential energy of the state will always be: A) Converted to work. B) Converted to mass. C) Increased. D) Decreased. Show Answer Correct Answer: D) Decreased. 30. An example of PASSIVE SOLAR HEATING would be ..... A) Having windows with southern exposure. B) Pumping water up to a solar panel to be heated. C) Using solar heated water to produce electricity. D) None of the above. Show Answer Correct Answer: A) Having windows with southern exposure. 31. Thermal energy transfer through electromagnetic waves is A) Conduction. B) Science. C) Radiation. D) Convection. Show Answer Correct Answer: C) Radiation. 32. According to the First Law of Thermodynamics, which of the following statements is true? A) Heat is a form of energy that can be created and destroyed. B) Heat can be transferred from a cold object to a hot object without external energy. C) Heat is a form of energy that can neither be created nor destroyed, only transferred. D) Heat is not a form of energy and does not follow the law of conservation. Show Answer Correct Answer: C) Heat is a form of energy that can neither be created nor destroyed, only transferred. 33. The equation that relates enthalpy, temperature and entropy is A) Hess's Law. B) Second Law of Thermodynamics. C) Gibbs Free Energy. D) Calorimetry. Show Answer Correct Answer: C) Gibbs Free Energy. 34. The temperature of a refrigerant increases as it passes through the metal coils in the interior of a refrigerator because the air inside the refrigerator- A) Transfers heat to the coils. B) Absorbs materials in the coils. C) Exerts a force on the coils. D) Does work on the coils. Show Answer Correct Answer: A) Transfers heat to the coils. 35. Burning your hand on a hot pan A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: A) Conduction. 36. ..... is the randomness or disorder of a thermodynamic system. A) Energy. B) Temperature. C) Heat. D) Entropy. Show Answer Correct Answer: D) Entropy. 37. The first law of thermodynamics is based on what essential idea? A) Thermal equilibrium is reached between two or more objects in direct contact. B) Energy is conserved in thermodynamic systems. C) A system can have zero energy if it is cooled to 0 K. D) No engine can be 100% efficient. Show Answer Correct Answer: B) Energy is conserved in thermodynamic systems. 38. The equation for the third law of thermodynamics is: A) $\Delta S_{sys}=\Delta S_{univ}+\Delta S_{surr}$. B) $\Delta S_{univ}=\Delta S_{sys}-\Delta S_{surr}$. C) $\Delta S_{sys}=0$. D) $\Delta S_{sys}=\Delta S_{univ}-\Delta S_{surr}$. Show Answer Correct Answer: C) $\Delta S_{sys}=0$. 39. If object A and B have the same temperature, and object C is the same temperature as object A the all three are the same temperature. This tendency illustrates which of the following laws of thermodynamics? A) Second Law. B) First Law. C) Zeroth Law. D) Third Law. Show Answer Correct Answer: C) Zeroth Law. 40. The Sun warms the Earth by ..... A) Convection. B) Radiation. C) Conduction. D) Induction. Show Answer Correct Answer: B) Radiation. 41. ..... of thermodynamics is used to understand the concept of energy conservation. A) Third law. B) Zeroth law. C) First law. D) Second law. Show Answer Correct Answer: C) First law. 42. Mark the option the correctly completes the sentence below:"If thermal energy is ADDED to a system, it should:" A) Get colder. B) Get warmer. C) Not change its temperature. D) Not show changes in molecular kinetic energy. Show Answer Correct Answer: B) Get warmer. 43. Which law of Thermodynamics helps to explain how car engines work? A) 3rd Law. B) 2nd Law. C) 1st Law. D) Zeroth Law. Show Answer Correct Answer: C) 1st Law. 44. Mathematical equation of first law of thermodynamics isHere U means delta U A) U=q+W. B) Q=U+W. C) W=U+q. D) None of these. Show Answer Correct Answer: A) U=q+W. 45. Identify the incorrect statement among the following.-A:A reaction is spontaneous at a given temperature if the Gibbs Free Energy change is negative.-B:Gibbs Free Energy change being zero indicates a system at equilibrium at a constant temperature and pressure.-C:For a spontaneous process, the change in entropy of the universe must be negative. A) A. B) B. C) C. D) None of the above. Show Answer Correct Answer: C) C. 46. READ CAREFULLY! YOU HAVE TIME!A substance with a low specific heat requires less energy to heat up and a substance with high specific heat require more energy to heat up and heats up slower A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 47. When you place the metal in boiling water, heat flows from the ..... to the ..... A) Boiling water to the metal. B) Metal to the boiling water. C) Bottom of the metal to the top half of the metal. D) Bottom of the water to the top of the water. Show Answer Correct Answer: A) Boiling water to the metal. 48. Melting of ice is an example of an ..... process. A) Adiabatic. B) Isothermal. C) Isometric. D) None of these. Show Answer Correct Answer: B) Isothermal. 49. First law of thermodynamics represents A) Law of entropy. B) Thermal equilibrium. C) Law of conservation of energy. D) Law of heat conservation. Show Answer Correct Answer: C) Law of conservation of energy. 50. In a thermal power plant thermodynamic cycle used is A) Carnot. B) Erricson. C) Brayton. D) Joule. E) Rankine. Show Answer Correct Answer: E) Rankine. 51. The lowest temperature at which the oils gives enough vapour. A) Cloud point. B) Fire point. C) Pour point. D) Flash point. Show Answer Correct Answer: D) Flash point. 52. A zero-order reaction is characterized by: A) A constant half-life. B) Doubling the concentration doubles the rate. C) The rate is independent of reactant concentration. D) The rate depends linearly on concentration. Show Answer Correct Answer: C) The rate is independent of reactant concentration. 53. Ice point of water is ..... degree celcius. A) 273. B) 100. C) 0. D) 10. Show Answer Correct Answer: C) 0. 54. How is work calculated? A) Force x Energy. B) Force + Energy. C) Distance x Energy. D) Force x Distance. Show Answer Correct Answer: D) Force x Distance. 55. The efficiency of a heat engine is always less than 100% due to which law of thermodynamics? A) Zeroth Law. B) 1st law of thermodynamics. C) 3rd law of thermodynamics. D) 2nd law of thermodynamics. Show Answer Correct Answer: D) 2nd law of thermodynamics. 56. Two blocks of steel, the first of mass 1 kg and the second of mass 2 kg, are in thermal equilibrium with a third block of aluminum of mass 2 kg that has a temperature of 400 K. What are the respective temperatures of the first and second steel blocks? A) 400 K and 200 K. B) 200 K and 400 K. C) 400 K and 400 K. D) 800 K and 400 K. Show Answer Correct Answer: C) 400 K and 400 K. 57. Carole owns a two story house with a heating and cooling unit on each floor. In the winter she mostly uses the downstairs unit because the volume of warm air ..... and ..... warming the whole house through ..... A) Expands, rises, convection. B) Expands, sinks, conduction. C) Contracts, rises, conversion. D) Contracts, sinks, contraption. Show Answer Correct Answer: A) Expands, rises, convection. 58. What is the main concept introduced by the Second Law of Thermodynamics? A) Absolute zero. B) Energy conservation. C) Thermal equilibrium. D) Entropy. Show Answer Correct Answer: D) Entropy. 59. A chair is several feet from a fireplace. The side of the chair facing the fireplace gets warm due to A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: C) Radiation. 60. The zeroth law of thermodynamics is fundamental in defining which of the following concepts? A) Work. B) Temperature. C) Energy. D) Heat. Show Answer Correct Answer: B) Temperature. ← 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