This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 47 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 47 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. According to the first law of thermodynamics, what is the principle it states? A) Energy cannot be created nor destroyed. B) Energy can only be transferred as heat. C) Entropy always increases in an isolated system. D) Heat flows from a higher temperature to a lower temperature. Show Answer Correct Answer: A) Energy cannot be created nor destroyed. 2. Six molecules have the following speeds:2m/s, 5m/s, 3 m/s, 6m/s, 3m/s, and 5m/s respectively. Find the rms speed. A) 4m/s. B) 1.7m/s. C) 4.2m/s. D) 5m/s. Show Answer Correct Answer: C) 4.2m/s. 3. The absolute zero pressure will be A) When molecular momentum of the system becomes zero. B) At sea level. C) At a temperature of-273.15 K. D) Under vacuum conditions. Show Answer Correct Answer: A) When molecular momentum of the system becomes zero. 4. Particles (molecules) in a ..... have less energy than the other states of matter. A) Gas. B) Solid. C) Liquid. D) None of the above. Show Answer Correct Answer: B) Solid. 5. Whenever heat is added to a system, it transforms to an equal amount of some other form of energy describes which law of thermodynamics? A) 1st Law of thermodynamics. B) 2nd Law of thermodynamics. C) 3rd Law of thermodynamics. D) 4th Law of thermodynamics. Show Answer Correct Answer: A) 1st Law of thermodynamics. 6. A process is spontaneous due to: A) Infinitely small gradient. B) Finite gradient. C) All the above. D) None of the above. Show Answer Correct Answer: B) Finite gradient. 7. A refrigerator is A) A heat engine. B) An air cooler. C) An electric motor. D) A heat engine working in the reverse order. Show Answer Correct Answer: D) A heat engine working in the reverse order. 8. Consider the following two processes; I. A heat source at 1200 K loses 2500kJ of heat to a sink at 800 KII. A heat source at 800 K loses 2000 kJ of heat to a sink at 500 Kwhich of the following statement is true? A) Process I is more irreversible than process II. B) Process II is more irreversible than process I. C) Irreversibility associated in both the processes are equal. D) Both the process are reversible. Show Answer Correct Answer: B) Process II is more irreversible than process I. 9. What does the First Law of Thermodynamics state about energy in a closed system? A) Energy can be created but not destroyed. B) Energy can neither be created nor destroyed, only transformed from one form to another. C) Energy is always lost when work is done. D) Energy within a closed system remains constant over time. Show Answer Correct Answer: B) Energy can neither be created nor destroyed, only transformed from one form to another. 10. True/False:Heat is a type of energy A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. A measure of the amount of disorder or randomness in a system. A) Entropy. B) Exothermic. C) First Law of Thermodynamics. D) Heat engine. Show Answer Correct Answer: A) Entropy. 12. Which of the following statements is true according to the First Law of Thermodynamics? A) Energy can be created or destroyed, but not transformed. B) Energy can be transformed, but not created or destroyed. C) Energy can neither be created nor destroyed, only transformed. D) Energy can be created and destroyed, but not transformed. Show Answer Correct Answer: C) Energy can neither be created nor destroyed, only transformed. 13. The gaseous layer which protects human life from on earth uv radiation is A) Oxygen. B) Ozone. C) Nitrogen. D) Carbondioxide. Show Answer Correct Answer: B) Ozone. 14. What is the significance of the phase diagram in thermodynamics? A) It shows only the temperature of a substance. B) The phase diagram is significant as it illustrates the relationships between temperature, pressure, and the phases of a substance, aiding in the prediction of phase behavior. C) It is used solely for calculating energy levels of substances. D) It predicts the exact time a phase change will occur. Show Answer Correct Answer: B) The phase diagram is significant as it illustrates the relationships between temperature, pressure, and the phases of a substance, aiding in the prediction of phase behavior. 15. Heat flow into a system is taken to be ..... , and heat flow out of the system is taken as ..... A) Negative, positive. B) Negative, negative. C) Positive, positive. D) Positive, negative. Show Answer Correct Answer: D) Positive, negative. 16. The equation of state for n moles of an ideal gas is PV=nRT, where R is a constant. The SI units for R are the following: A) J/K. B) J/mol. C) (J x mol)/K. D) J/(mol x K). Show Answer Correct Answer: D) J/(mol x K). 17. What is the meaning of open system? A) No heat & mass transfer across boundary. B) Only heat transfer across boundary. C) Heat & mass transfer across boundary. D) Only mass transfer across boundary. Show Answer Correct Answer: C) Heat & mass transfer across boundary. 18. In a thermodynamic cycle, which of the following statements is true about the net work done by the system? A) It is equal to the net heat added to the system. B) It is always zero. C) It is equal to the change in internal energy. D) It is equal to the entropy change. Show Answer Correct Answer: A) It is equal to the net heat added to the system. 19. Which powder produced the greatest temperature decrease? A) NaCl. B) NH4NO3. C) CaCl2. D) KCl. Show Answer Correct Answer: B) NH4NO3. 20. Define Q A) The amount of heat added to a system. B) The amount of work added to a system. C) The amount of heat produced by a system. D) The amount of work done by a system. Show Answer Correct Answer: A) The amount of heat added to a system. 21. System A is in equilibrium with system C.System B is in equilibrium with system C.System A is in equilibrium with system B according to which law of thermodynamics? A) Zeroth Law of Thermodynamics. B) First Law of Thermodynamics. C) Second Law of Thermodynamics. D) Third Law of Thermodynamics. Show Answer Correct Answer: A) Zeroth Law of Thermodynamics. 22. Efficiency is a ..... of what you put in versus what you get out of a system. A) Source. B) Ratio. C) Multiplication. D) Addition. Show Answer Correct Answer: B) Ratio. 23. Which would have more entropy? A) Frozen ice cream. B) Liquid Ice cream. C) All the above. D) None of the above. Show Answer Correct Answer: B) Liquid Ice cream. 24. State the second law of thermodynamics. A) Energy cannot be created or destroyed. B) Heat flows from cold to hot spontaneously. C) The total energy of an isolated 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. 25. If a refrigerator is having COP of 1.5 then the Heat pump working between same temperature limits will have COP A) 1. B) 1.5. C) 2. D) 2.5. Show Answer Correct Answer: D) 2.5. ← 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