This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 30 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following statements is NOT a correct assumption of the classical model of an ideal gas? A) The molecules are in random motion. B) The volume of the molecules is negligible compared with the volume occupied by the gas. C) The molecules obey Newton's laws of motion. D) The collisions between molecules are inelastic. Show Answer Correct Answer: D) The collisions between molecules are inelastic. 2. The thermal energy needed to boil a liquid is the heat of ..... A) Condensation. B) Vaporization. C) Fusion. D) Specific heat. Show Answer Correct Answer: B) Vaporization. 3. In a heat engine, which of the following is true about the efficiency if the temperature of the cold reservoir is decreased? A) Efficiency increases. B) Efficiency decreases. C) Efficiency remains the same. D) Efficiency becomes zero. Show Answer Correct Answer: A) Efficiency increases. 4. J of heat are added to a sample of gas while the gas does 400 J of work on the environment. What is the change in internal energy of the gas? A) 800 J. B) 1600 J. C) -800 J. D) -1600 J. Show Answer Correct Answer: A) 800 J. 5. Study of the relationship between thermal energy, heat, and work. A) 1st Law of Thermodynamics. B) 2nd law of thermodynamics. C) Heat. D) Heat engine. E) Themodynamics. Show Answer Correct Answer: E) Themodynamics. 6. A thermal property that remains constant during an adiabatic process. A) Efficiency. B) Volume. C) Entropy. D) None. Show Answer Correct Answer: C) Entropy. 7. Area under P-V diagram gives A) Heat. B) Internal energy. C) Work done. D) Temperature. Show Answer Correct Answer: C) Work done. 8. In a pressure cooker, a lid is screwed tightly onto a pot so that the air pressure in the pot is increased. What effect, if any, will this have on the boiling point of water in the pot? A) The boiling point will be raised. B) The boiling point will be lowered. C) The boiling point will be unaffected. D) None of the above. Show Answer Correct Answer: A) The boiling point will be raised. 9. A gas expands isothermally against a constant external pressure of 1 atm from a volume of 10dm3 to a volume of 20L . In this process it absorbs 800J of thermal energy from its surroundings . Calculate the internal energy change in the entire process in Joules. A) 200. B) 213. C) 400. D) 826. Show Answer Correct Answer: B) 213. 10. There is a natural tendency for energy to spread out. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. One mole of an ideal gas expands against a constant external pressure of 1 atm from a volume of 10L to 30L. Calculate the work done by the gas in Latm. A) +20. B) -20. C) 40. D) -40. Show Answer Correct Answer: B) -20. 12. As time progresses, Energy will naturally become more spread out. It can only come together if you make it. A) Zeroth Law of Thermodynamics. B) First Law of Thermodynamics. C) Second Law of Thermodynamics. D) Third Law of Thermodynamics. Show Answer Correct Answer: C) Second Law of Thermodynamics. 13. A closed system is when energy flows across the boundary. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 14. Which one of the following statements concerning heat engines is false? A) A heat engine receives heat from a hot reservoir. B) A heat engine is a device that uses heat to do work. C) Heat engines generally operate near one hundred percent efficiency. D) Part of the heat input to the engine is used to do work by the working substance within the engine. E) Part of the input heat is rejected to a cold reservoir. Show Answer Correct Answer: C) Heat engines generally operate near one hundred percent efficiency. 15. Work done is + positive when A) Work is done on the system. B) Work is done by the system. C) All the above. D) None of the above. Show Answer Correct Answer: A) Work is done on the system. 16. Releases energy (occurs spontaneously) A) Metabolism. B) Endergonic reaction. C) Exergonic reaction. D) Photosynthesis. Show Answer Correct Answer: C) Exergonic reaction. 17. If a process is exothermic and not spontaneous, then what MUST be true? A) $\Delta$S > 0. B) $\Delta$H > 0. C) $\Delta$G = 0. D) $\Delta$S < 0. Show Answer Correct Answer: D) $\Delta$S < 0. 18. Explain the concept of adiabatic processes. A) An adiabatic process is a thermodynamic process with no heat exchange with the surroundings. B) An adiabatic process occurs at constant pressure. C) An adiabatic process involves heat transfer to the surroundings. D) An adiabatic process is a type of isothermal process. Show Answer Correct Answer: A) An adiabatic process is a thermodynamic process with no heat exchange with the surroundings. 19. Who invented carnot engine A) Rutherford. B) Sadi Carnot. C) C V Raman. D) Thomson. Show Answer Correct Answer: B) Sadi Carnot. 20. In sign convention, heat is POSITIVE when heat is REJECTED from the system. Heat is NEGATIVE when heat is ABSORBED by the system. A) 1st Statement-False2nd Statement-True. B) Both Statements are False. C) 1st Statement-True2nd Statement-False. D) Both Statement are True. Show Answer Correct Answer: B) Both Statements are False. 21. Is the reaction from ATP to ADP exergonic or endergonic? A) Exergonic. B) Endergonic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Exergonic. 22. Your enthalpy is positive and your entropy is positive. What type of temperature would you want to ensure a spontaneous reaction. A) Very high. B) Very low. C) All the above. D) None of the above. Show Answer Correct Answer: A) Very high. 23. Which law of conservation of states that energy of a system may change forms, but is neither created or destroyed. A) 1st. B) 2nd. C) 3rd. D) Zeroeth. Show Answer Correct Answer: A) 1st. 24. Zeroth law of thermodynamics shows the existence of ..... ? A) Pressure. B) Volume. C) Temperature. D) Heat. Show Answer Correct Answer: C) Temperature. 25. The first law of thermodynamics, the internal energy of a system can either be increased by adding heat or doing work on the system, is a restatement of the ..... A) Principle of entropy. B) Law of Conservation of energy. C) Law of heat addition. D) Law of potential energy. Show Answer Correct Answer: B) Law of Conservation of energy. ← 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