This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 31 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A thermodynamic system where no exchange of heat takes place between system and surrounding is ..... A) Isothermal process. B) Adiabatic process. C) Isobaric process. D) Isochoric process. Show Answer Correct Answer: B) Adiabatic process. 2. Which is NOT allowed in a closed system? A) Mass flow. B) Heat added. C) Work done. D) None of the above. Show Answer Correct Answer: A) Mass flow. 3. What does the zeroth law of thermodynamics establish? A) The concept of entropy. B) The principle of energy conservation. C) The concept of temperature. D) The relation between heat and work. Show Answer Correct Answer: C) The concept of temperature. 4. NASA developed a reflective foil barrier to help shield spacecraft from heat transfer in space. These reflective barriers are not used in homes to prevent heat transfer by the same method. What method of heat transfer is being prevented by the reflective barrier? A) Entropy. B) Conduction. C) Convection. D) Radiation. Show Answer Correct Answer: D) Radiation. 5. In a closed system, what happens to the entropy when a gas expands? A) Entropy increases. B) Entropy decreases. C) Entropy remains constant. D) Entropy becomes zero. Show Answer Correct Answer: A) Entropy increases. 6. If a chemical reaction is spontaneous, the total entropy of the chemical systems and its surroundings ..... A) Always decreases. B) Always increases. C) Increases only if the reaction is endothermic. D) Increases only if the reaction is exothermic. Show Answer Correct Answer: B) Always increases. 7. A glass of unsweetened lemonade and ice is stirred, and the temperature is recorded as 0 $^\circ$C. An additional cube of ice at-10 $^\circ$C is added to the lemonade and ice. Which statement describes what will happen to the lemonade and ice mixture? A) It will cool to-10 $^\circ$C. B) It will turn completely to a solid. C) It will cool to slightly less than 0 $^\circ$C. D) It will remain at 0 $^\circ$C. Show Answer Correct Answer: D) It will remain at 0 $^\circ$C. 8. Which of the following is a real-world application of the second law of thermodynamics? A) A refrigerator cooling food by removing heat from inside and releasing it outside. B) A car engine converting all fuel energy into mechanical work without any loss. C) A solar panel converting sunlight into electricity with 100% efficiency. D) A perpetual motion machine that runs indefinitely without energy input. Show Answer Correct Answer: A) A refrigerator cooling food by removing heat from inside and releasing it outside. 9. For a heat engine operating between two temperatures (T2 > T1), what is the maximum efficiency attainable? A) 1-(T1/T2). B) 1-(T2/T1). C) T1-T2. D) 1-(T12/T2). Show Answer Correct Answer: A) 1-(T1/T2). 10. Do molecules generally move faster at 45 C or 106 C? A) 45 C because molecules have more energy than in 106C. B) 106 C because molecules have more energy than in 45C. C) 106 C because molecules have less energy than in 45C. D) 45C because molecules have less energy than in 106 C. Show Answer Correct Answer: B) 106 C because molecules have more energy than in 45C. 11. Is the combustion of gasoline a spontaneous or nonspontaneous process? A) Spontaneous. B) Nonspontaneous. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nonspontaneous. 12. The bond energy (in kcal mol-1) of a C-C single bond is approximately: A) 83-85. B) 10. C) 1000. D) 1. Show Answer Correct Answer: A) 83-85. 13. The system that does not allow the heat to pass through its boundary between the system and surrounding is called as ..... System. A) Adiabatic. B) Open. C) Isothermal. D) Closed. Show Answer Correct Answer: A) Adiabatic. 14. Gas A is in thermal equilibrium with gases B and C. Which of the following is a valid conclusion? A) Thermal equilibrium of gas B is directly proportional to that of gas C. B) Gases A and B have equal amounts of entropy. C) Thermal equilibrium of gas B is indirectly proportional to that of gas C. D) Gases B and C are in thermal equilibrium with each other. Show Answer Correct Answer: D) Gases B and C are in thermal equilibrium with each other. 15. Which is an example of CONDUCTION: A) Wind. B) Burning your arm on the oven. C) Standing by a bonfire. D) None of the above. Show Answer Correct Answer: B) Burning your arm on the oven. 16. What is the primary driving force for reactions at the molecular level? A) Electromagnetic force. B) Gravitational force. C) Nuclear force. D) Molecular collisions. Show Answer Correct Answer: D) Molecular collisions. 17. Exothermic reactions ..... A) Absorb energy. B) Release energy. C) Release Color. D) Absorb Color. Show Answer Correct Answer: B) Release energy. 18. Myra is studying thermodynamics and learns about heat engines. She discovers that a heat engine receives heat from a heat source at 1000 degree Celsius and rejects heat to a sink at 40 degree Celsius. What is the thermal efficiency of the heat engine? A) 75.5%. B) 96%. C) 4%. D) 24.5%. Show Answer Correct Answer: A) 75.5%. 19. A measure of the average kinetic energy of the individual particles in an object is called: A) Thermal energy. B) Conduction. C) Convection. D) Temperature. Show Answer Correct Answer: D) Temperature. 20. Identify the correct statement regarding a spontaneous process: A) Lowering of energy in the reaction process is the only criterion for spontaneity. B) For a spontaneous process in an isolated system, the change in entropy is positive. C) Endothermic processes are never spontaneous. D) Exothermic processes are always spontaneous. Show Answer Correct Answer: B) For a spontaneous process in an isolated system, the change in entropy is positive. 21. Which of the following hardware would be considered a 'closed system'? A) A nozzle. B) A piston cylinder device. C) A turbine. D) A diffuser. Show Answer Correct Answer: B) A piston cylinder device. 22. Aisha is studying thermodynamics and comes across a question about the SI unit of entropy. She wonders what it is. A) KJ/kgK. B) KW/K. C) KJ/K. D) KJ/kg. Show Answer Correct Answer: C) KJ/K. 23. If A has the same temperature as B and C. B and C are in thermal equilibrium. Which law does this refer to? A) 0th law of thermodynamics. B) 1st law of thermodynamics. C) 2nd law of thermodynamics. D) 3rd law of thermodynamics. Show Answer Correct Answer: A) 0th law of thermodynamics. 24. All thermodynamics can be expressed in terms of four quantities, EXCEPT: A) Temperature. B) Internal Energy. C) Entropy. D) Luminous Intensity. Show Answer Correct Answer: D) Luminous Intensity. 25. Work is A) Pressure x temperature change. B) Pressure x heat change. C) Pressure x volume change. D) Heat x volume change. Show Answer Correct Answer: C) Pressure x volume change. ← 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