This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What does an endergonic reaction do with energy? A) Released energy. B) Stores energy. C) All the above. D) None of the above. Show Answer Correct Answer: B) Stores energy. 2. Which statement is true about the ENTROPY? A) Entropy refers to DISORDER, the unusable energy that escapes a system. B) Entropy refers to the balance of temperature among two or more systems. C) Entropy refers to the average kinetic energy of the molecules. D) Entropy refers to the inability to destroy or create energy. Show Answer Correct Answer: A) Entropy refers to DISORDER, the unusable energy that escapes a system. 3. In a Carnot engine, which of the following is true about the efficiency of the engine? A) It is dependent on the specific heat of the working substance. B) It is independent of the temperatures of the hot and cold reservoirs. C) It is the highest possible efficiency for any engine operating between two temperatures. D) It decreases as the temperature of the hot reservoir increases. Show Answer Correct Answer: C) It is the highest possible efficiency for any engine operating between two temperatures. 4. It is the degree of hotness or coldness of a substance or body A) Specific Heat. B) Latent Heat. C) Temperature. D) Sensible Heat. Show Answer Correct Answer: C) Temperature. 5. As temperature rises ..... A) An atom's kinetic energy decreases. B) An atom's kinetic energy increases. C) An atom's kinetic energy stays the same. D) None of the above. Show Answer Correct Answer: B) An atom's kinetic energy increases. 6. Which of the following is not a state function? A) Entropy. B) Enthalpy. C) Work. D) Internal energy. Show Answer Correct Answer: C) Work. 7. The physics of the refrigerator closely resembles the A) Ice formation. B) Heat engine. C) Vapour compression machin. D) Vaporization of water. Show Answer Correct Answer: B) Heat engine. 8. What remains constant in an isothermal process? A) Temperature. B) Entropy. C) Volume. D) Gibbs free energy. Show Answer Correct Answer: A) Temperature. 9. In adiabatic process heat change is A) Infinite. B) Maximum. C) Zero. D) None. Show Answer Correct Answer: C) Zero. 10. Describe the Carnot cycle and its importance. A) The Carnot cycle operates only in a single temperature reservoir. B) The Carnot cycle is a practical engine design used in modern vehicles. C) The Carnot cycle is a theoretical thermodynamic cycle that defines the maximum efficiency of a heat engine operating between two temperature reservoirs. D) The Carnot cycle is a method for generating electricity from solar energy. Show Answer Correct Answer: C) The Carnot cycle is a theoretical thermodynamic cycle that defines the maximum efficiency of a heat engine operating between two temperature reservoirs. 11. The entropy in the universe A) Increases. B) Decreases. C) Remains constant. D) Depends on time. Show Answer Correct Answer: A) Increases. 12. At absolute zero entropy of a system tends to A) Maximum. B) Zero. C) Infinity. D) None of theses. Show Answer Correct Answer: B) Zero. 13. Which scenario exemplifies the second law of thermodynamics? A) A cup of hot coffee placed on a table eventually cools down to room temperature. B) A refrigerator operates by transferring heat from its interior to the warmer surroundings. C) A block of ice melts in a glass of water, absorbing heat from the liquid. D) Heat flows from a higher temperature object to a lower temperature object spontaneously. Show Answer Correct Answer: D) Heat flows from a higher temperature object to a lower temperature object spontaneously. 14. Identify the incorrect statement among the following.-A:Entropy is a measure of disorder or randomness in a system, increasing in irreversible processes.-B:The entropy of an isolated system remains constant if the processes are reversible.-C:Consider cooling a closed system, total entropy change can be negative because energy is removed from the system. A) A. B) B. C) C. D) None of the above. Show Answer Correct Answer: C) C. 15. All phase changes (changing states) requires energy to be added or taken away. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. A measure of the total kinetic energy of the molecules in a substance A) Thermal energy. B) Temperature. C) Heat. D) None of the above. Show Answer Correct Answer: A) Thermal energy. 17. When ammonium nitrate dissolves in water, the solution gets cold. Which is true? A) Reaction is ENDOTHERMIC with positive $\Delta$H. B) Reaction is ENDOTHERMIC with-$\Delta$H. C) Reaction is EXOTHERMIC with a-$\Delta$H. D) Reaction is EXOTHERMIC with +$\Delta$H. Show Answer Correct Answer: A) Reaction is ENDOTHERMIC with positive $\Delta$H. 18. The variable of WORK is A) W. B) Q. C) E. D) None of the above. Show Answer Correct Answer: A) W. 19. Properties whose values depend on the size/extent-of the system are: A) Intensive. B) Extensive. C) All the above. D) None of the above. Show Answer Correct Answer: B) Extensive. 20. Which of the following processes is an example of an isothermal process? A) Melting of ice at 0$^\circ$C. B) Heating of water from 20$^\circ$C to 100$^\circ$C. C) Compression of a gas in an insulated cylinder. D) Expansion of a gas in a vacuum. Show Answer Correct Answer: A) Melting of ice at 0$^\circ$C. 21. The entropy for irreversible process is always A) Increases. B) Decreases. C) Zero. D) Remains constant. Show Answer Correct Answer: A) Increases. 22. For exothermic reaction $\Delta$ A) Positive. B) Negative. C) All the above. D) None of the above. Show Answer Correct Answer: B) Negative. 23. Rapidly inflating of balloon under a pumping machine. A) Adiabatic. B) Isovolumetric. C) Isochoric. D) Isothermal. Show Answer Correct Answer: A) Adiabatic. 24. During adiabiatic reversible expansion q is equal to A) 1. B) <1. C) >1. D) 0. Show Answer Correct Answer: D) 0. 25. What happens to the entropy of a system when a gas expands into a vacuum? A) Entropy decreases. B) Entropy increases. C) Entropy remains constant. D) Entropy becomes zero. Show Answer Correct Answer: B) Entropy increases. ← PreviousNext →Related 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 8Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 9Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books