This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A sample of iron receives 125J of heat energy that raises the temperature of the iron 32.0$^\circ$C. What is the mass of the iron sample? A) 8.70g. B) 14.4 g. C) 20 g. D) 50 g. Show Answer Correct Answer: A) 8.70g. 2. What happens on a molecular level when heat is removed from an object? A) The temperature decreases and the molecules move faster. B) The temperature increases and the molecules move slower. C) The temperature increases and the molecules molecules move faster. D) The temperature decreases and the molecules move slower. Show Answer Correct Answer: D) The temperature decreases and the molecules move slower. 3. A thermodynamic system where matter does not cross the system boundary A) Open system. B) Closed system. C) Isolated system. D) None of the above. Show Answer Correct Answer: B) Closed system. 4. Which of the following processes is an example of heat transfer through conduction? A) A metal spoon getting hot from a boiling pot of water. B) Warm air rising to the ceiling. C) Sunlight warming the Earth's surface. D) A microwave heating food. Show Answer Correct Answer: A) A metal spoon getting hot from a boiling pot of water. 5. A reversed heat engine A) Receives heat from a low temperature region. B) Gives heat to a high temperature region. C) Receives a net inflow of work. D) All of the mentioned. Show Answer Correct Answer: D) All of the mentioned. 6. In a thermodynamic process, if the work done by the system is 50 J and the heat absorbed is 30 J, what is the change in internal energy? A) 20 J. B) -20 J. C) 80 J. D) -80 J. Show Answer Correct Answer: B) -20 J. 7. Transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from one place to another. A) Convection. B) Radiation. C) Themal insulator. D) Heat engine. E) Conduction. Show Answer Correct Answer: A) Convection. 8. The more particles a substance has at a given temperature, A) The higher its temperature. B) The more thermal energy it has. C) The more degrees it has. D) The more kelvins it has. Show Answer Correct Answer: B) The more thermal energy it has. 9. What is the amount of energy is required to raise the temperature of 43 g of liquid water from 25$^\circ$C to 55$^\circ$C? Water's specific heat is 4.18 J/g$^\circ$C. A) 5.39 kJ. B) 5390 kJ. C) 4.49 kJ. D) 9.88 kJ. Show Answer Correct Answer: A) 5.39 kJ. 10. The enthalpies of combustion of carbon and carbon monoxide are-393.5 and-283.0 kJ mol-1 respectively. The enthalpy of formation of carbon monoxide is: A) 110.5 kJ. B) -676 kJ. C) 676.5 kJ. D) -110.5 kJ. Show Answer Correct Answer: D) -110.5 kJ. 11. Close the door, you're letting the cold air out! A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 12. Human body is a ..... system A) Open. B) Closed. C) Isolated. D) None of the above. Show Answer Correct Answer: A) Open. 13. The following question has four choices out of which ONLY ONE is correct.Which of the following is incorrect regarding the first law of thermodynamics? A. It is not applicable to any cyclic process B. It is a restatement of the principle of conservation of energy C. It introduces the concept of the internal energy D. It introduces the concept of the entropy A) A and D. B) B and C. C) C and A. D) A and B. Show Answer Correct Answer: A) A and D. 14. What does the Zeroeth Law of Thermodynamics state? A) If two bodies are in thermal equilibrium with a third body, they are not in equilibrium with each other. B) If two bodies are in thermal equilibrium with a third body, they are also in equilibrium with each other. C) If two bodies are in thermal equilibrium, they must be at the same temperature. D) If two bodies are not in thermal equilibrium, they cannot exchange heat. Show Answer Correct Answer: B) If two bodies are in thermal equilibrium with a third body, they are also in equilibrium with each other. 15. Entropy of a system increases when it gains energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. What is a spontaneous process? A) Is reversible. B) Is irreversible. C) May be reversible or irreversible depending on the value of $\Delta$S. D) May be reversible or irreversible depending on whether equilibrium is maintained throughout the process. Show Answer Correct Answer: B) Is irreversible. 17. What happens to particles when they are heated? A) They speed up and spread out. B) They slow down and compress. C) They stop moving. D) They move closer together and speed up. Show Answer Correct Answer: A) They speed up and spread out. 18. Which law states that the change of enthalpy in a chemical reaction is the same regardless of whether the reaction takes place in one step or several steps, provided the initial and final states of the reactants and products are the same? A) Third Law of Thermodynamics. B) Netwon's Law of Cooling. C) Hess's Law. D) Joule's Law of Heating. Show Answer Correct Answer: C) Hess's Law. 19. $\Delta$H value in an endothermic reaction is a positive number. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 20. A definite area or space where some thermodynamic process takes place is known as A) Thermodynamic system. B) Thermodynamic cycle. C) Thermodynamic process. D) Thermodynamic process. Show Answer Correct Answer: A) Thermodynamic system. 21. In a closed system, if the internal energy increases by 50 J and 20 J of work is done by the system, how much heat is added to the system? A) 30 J. B) 70 J. C) 50 J. D) 20 J. Show Answer Correct Answer: B) 70 J. 22. Why can't all of the energy in a system be used to do work? A) Energy is destroyed during a process. B) Entropy causes some energy to become unavailable. C) All energy is used for heat. D) Energy is always constant and never changes. Show Answer Correct Answer: B) Entropy causes some energy to become unavailable. 23. Enthalpy H = A) U-PV. B) U+PV. C) PV. D) PV-U. Show Answer Correct Answer: B) U+PV. 24. A container holds 600 g of water at 40$^\circ$C. A block of iron is poured at 120$^\circ$C is poured in it. Minutes later the temperature of both materials reach a thermal equilibrium temperature of 60 $^\circ$C. Assume the system is thermally insulated, what is the mass of the iron block, in kg? Given:c$_{iron}$ = 0.486 kJ/kg.$^\circ$Cc$_{water}$ = 4.18 kJ/kg.$^\circ$C A) 1.72 kg. B) 1.20 kg. C) 2.96 kg. D) 0.86 kg. Show Answer Correct Answer: A) 1.72 kg. 25. If system A is in thermal equilibrium with system C and system B is also in thermal equilibrium with system C, system A and system B are in thermal equilibrium with each other. A) First Law of Thermodynamics. B) Second Law of Thermodynamics. C) Third Law of Thermodynamics. D) Zeroth Law of Thermodynamics. Show Answer Correct Answer: D) Zeroth Law of Thermodynamics. ← 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