This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A) Diathermal wall is one with A) Thermally conducting wall. B) Insulator. C) Both Thermally conducting wall and Insulator. D) None of these. Show Answer Correct Answer: A) Thermally conducting wall. 2. For an spontaneous process A) $\Delta S>0$. B) $\Delta S=0$. C) $\Delta S\le0$. D) $\Delta S<0$. Show Answer Correct Answer: A) $\Delta S>0$. 3. This refers to the heat required to change the phase of a substance A) Latent Heat. B) Fusion. C) Specific Heat. D) Sensible Heat. Show Answer Correct Answer: A) Latent Heat. 4. According to the second law of thermodynamics, which of the following statements is true? A) Entropy of an isolated system always increases. B) Entropy of an isolated system always decreases. C) Entropy of an isolated system remains constant. D) Entropy of an isolated system can fluctuate. Show Answer Correct Answer: A) Entropy of an isolated system always increases. 5. The entropy of the universe tends to be maximum. What of the laws of thermodynamics generalises to the above statement? A) Zeroth. B) First. C) Second. D) Third. Show Answer Correct Answer: C) Second. 6. Thermodynamics is the study of ..... and heat. A) Temperature. B) Energy. C) Mass. D) Force. Show Answer Correct Answer: B) Energy. 7. What does Gibbs Free Energy tell us? A) How much energy is given off by a reaction. B) The tendency of a reaction to become "random". C) How spontaneous a reaction is. D) None of the above. Show Answer Correct Answer: C) How spontaneous a reaction is. 8. The unit for specific heat A) Cal/gram degrees Celsius. B) Degrees Celsius. C) Calories. D) None of the above. Show Answer Correct Answer: A) Cal/gram degrees Celsius. 9. If a system goes from initial to final state without changing internal energy, then the heat supplied to system is A) Fully utilised for doing work. B) Partially utilised for doing work by the system. C) Partially utilised for doing work on the system. D) Not used for doing work. Show Answer Correct Answer: A) Fully utilised for doing work. 10. How much heat is needed to form 164.3 g of NO$_{2?}$N$_{2}$+ 2O$_{2}$ $\rightarrow$ 2NO$_{2}$$\Delta$H = +67kJ A) 58.2 kJ. B) 239.2. C) 59.8. D) 119.6. Show Answer Correct Answer: D) 119.6. 11. The molecular volume of any perfect gas at 600 x 103 N/m3 and 27?C will be A) 2.085 m3/kg mol. B) 4.17 m3/kg mol. C) 41.7 m3/kg mol. D) 85.3 m3/kg mol. E) 47.7 m3/kg mol. Show Answer Correct Answer: B) 4.17 m3/kg mol. 12. Identify the incorrect statement among the following.-A:The Second Law of Thermodynamics states that the entropy of an isolated system always increases over time.-B:It implies that energy transformations are not completely efficient, as some energy is always lost as heat.-C:This law dictates that heat can spontaneously flow from a colder to a hotter body. A) A. B) B. C) C. D) None of the above. Show Answer Correct Answer: C) C. 13. Coefficient of Viscocity of a gas is independent of A) Pressure. B) Average molecular velocity. C) Absolute Temperature. D) Mass of Molecule of gas. Show Answer Correct Answer: A) Pressure. 14. Enthalpy (H) is defined by the relation A) H = U + PV. B) H = U-PV. C) H = UV + P. D) H = PV-U. Show Answer Correct Answer: A) H = U + PV. 15. What determines the temperature of an object? A) The amount of potential energy in an object. B) The amount of heat it radiates. C) The amount of kinetic energy in an object. D) The amount of heat it absorbs from the environment. Show Answer Correct Answer: C) The amount of kinetic energy in an object. 16. In which of the following systems is entropy increasing? A) Putting together a puzzle. B) Putting books on a shelf. C) Breaking a plate. D) Filling a jar of salt. Show Answer Correct Answer: C) Breaking a plate. 17. During adiabatic, internally reversible process, what is true about the change in entropy? A) It is temperature dependent. B) It is always greater than zero. C) It is always zero. D) It is always less than zero. Show Answer Correct Answer: C) It is always zero. 18. Why do engineering devices such as pumps, turbines, nozzles, and diffusers perform best when irreversibilities such as friction are minimized? A) Minimizing irreversibilities reduces energy losses and provides less efficient operation. B) Minimizing irreversibilities increases energy losses and provides more efficient operation. C) Minimizing irreversibilities reduces energy losses and provides more efficient operation. D) None of the above. Show Answer Correct Answer: C) Minimizing irreversibilities reduces energy losses and provides more efficient operation. 19. Heat output cannot exceed heat input; or energy output cannot exceed energy input A) Zeroth Law of Thermodynamics. B) First Law of Thermodynamics. C) Second Law of Thermodynamics. D) Third Law of Thermodynamics. Show Answer Correct Answer: B) First Law of Thermodynamics. 20. Heat transfers from an area of ..... temperature to an area of ..... temperature. A) High-Low. B) High-High. C) Low-Low. D) Low-High. Show Answer Correct Answer: A) High-Low. 21. When applying the first law of thermodynamics to a system, when is heat a positive quantity? A) When the system does work. B) When the system has work done on it. C) When the system absorbs heat. D) When the system loses heat. E) When no work is done either on the system or by the system. Show Answer Correct Answer: C) When the system absorbs heat. 22. Melting point of ice is ..... $^{0}$ C A) 100. B) 120. C) 180. D) 0. Show Answer Correct Answer: D) 0. 23. The ..... of thermal dynamics tells that heat always flows from a hot body to a cold body till both bodies have an equal temperature A) Zeroth law. B) First law. C) Second law. D) Third law. Show Answer Correct Answer: A) Zeroth law. 24. Thermodynamic properties are A) Macroscopic in nature. B) Microscopic in nature. C) Neither micro nor macroscopic. D) None of the above. Show Answer Correct Answer: A) Macroscopic in nature. 25. Which of the following laws states that energy cannot be created or destroyed, only transformed from one form to another? A) First Law of Thermodynamics. B) Second Law of Thermodynamics. C) Third Law of Thermodynamics. D) Zeroth Law of Thermodynamics. Show Answer Correct Answer: A) First 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 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 10Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books