This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How much thermal energy must be added to a 250-g aluminum pan to raise its temperature from 20$^{0}$C to 85$^{0}$C? The specific heat of aluminum is 897 J/(kg *K). A) 1.0 x 10$^{6}$ J. B) 2.3 x 10$^{4 }$J. C) 1.45 x 10$^{7}$ J. D) 1.5 x 10$^{4}$ J. Show Answer Correct Answer: D) 1.5 x 10$^{4}$ J. 2. A student is cooking bacon in a pan on a stove top. What is the main method of heat transfer between the pan and the bacon? A) Conduction. B) Convection. C) Radiation. D) Entropy. Show Answer Correct Answer: A) Conduction. 3. Indicate whether $\Delta$S is positive, negative or zero for the following reactions:A) 2H$_{2}$ (g) + O$_{2}$ (g) $\rightarrow$ 2H$_{2}$O (g) B) 2NO$_{2}$ (g) $\rightarrow$ N$_{2}$O$_{4}$ (g) C) CO$_{2}$ (g) $\rightarrow$ CO$_{2}$ (s) A) Positive, negative, positive. B) Positive, positive, positive. C) Negative, positive, positive. D) Negative, negative, negative. Show Answer Correct Answer: D) Negative, negative, negative. 4. Absolute zero is ..... A) 273.15 F. B) -273.15 K. C) 273.15 K. D) -273.15 C. Show Answer Correct Answer: D) -273.15 C. 5. Thermal energy transfer through touching is A) Radiation. B) Conduction. C) Solar. D) Convection. Show Answer Correct Answer: B) Conduction. 6. Knudsen number is related to A) Continuum. B) Thermodynamic equilibrium. C) Phase. D) Pure substance. Show Answer Correct Answer: A) Continuum. 7. Which way does heat flow? A) Hot to cold. B) Cold to hot. C) It doesn't. D) None of the above. Show Answer Correct Answer: A) Hot to cold. 8. Heat transfer take place according to ..... A) Kirchhoff's law. B) Second law of thermodynamics. C) Zeroth law of thermodynamics. D) First law of thermodynamics. Show Answer Correct Answer: B) Second law of thermodynamics. 9. Which of the following is a statement of the Second Law of Thermodynamics? A) Energy cannot be created or destroyed, only transformed. B) The entropy of an isolated system always increases over time. C) For every action, there is an equal and opposite reaction. D) The total energy of an isolated system remains constant. Show Answer Correct Answer: B) The entropy of an isolated system always increases over time. 10. The reverse of heat vaporization is ..... A) Evaporation. B) Melting. C) Condensation. D) Freezing. Show Answer Correct Answer: C) Condensation. 11. Complete the following statement:The first law of thermodynamics states that ..... A) Two systems in thermal equilibrium with a third system are in equilibrium with each other. B) The entropy of the universe is increasing. C) Entropy is a function of the state of a system. D) The change in the internal energy of a system is given by Q-W. E) Heat is a form of energy. Show Answer Correct Answer: D) The change in the internal energy of a system is given by Q-W. 12. Mean free path is inversely proportional to A) Density. B) Pressure. C) Square of the diameter of the molecule. D) All of the above. Show Answer Correct Answer: D) All of the above. 13. An open system is one in which A) Heat and work cross the boundary, but the mass does not. B) Mass crosses the boundary, but the heat and work do not. C) Heat, work and mass cross the boundary. D) None of heat, work and mass cross the boundary. Show Answer Correct Answer: C) Heat, work and mass cross the boundary. 14. Specific heat capacity for water is ..... A) 4186 J/jkg * C. B) 1487J/jkg * C. C) 129 J/jkg * C. D) 138 J/jkg * C. Show Answer Correct Answer: A) 4186 J/jkg * C. 15. What does entropy describe in a thermodynamic system? A) The transition of energy from one form to another. B) The amount of disorder in the system. C) The process of heat transfer by direct contact. D) The emission and absorption of electromagnetic radiation. Show Answer Correct Answer: B) The amount of disorder in the system. 16. In an isothermal process A) Delta U=0. B) Q=0. C) T=0. D) None of these. Show Answer Correct Answer: A) Delta U=0. 17. If a metal rod is heated at one end, how is the thermal energy transferred to the other end? A) Convection. B) Advection. C) Radiation. D) Conduction. Show Answer Correct Answer: D) Conduction. 18. Which of the following is a state function in thermodynamics? A) Work. B) Heat. C) Enthalpy. D) Power. Show Answer Correct Answer: C) Enthalpy. 19. A jacket is a good example of an ..... A) Interrogator. B) Investigator. C) Insulator. D) Conductor. Show Answer Correct Answer: C) Insulator. 20. Which statement is true regarding exothermic reactions? A) Temperature change is positive and enthalpy change is positive. B) Temperature change is positive and enthalpy change is negative. C) Temperature change is negative and enthalpy change is positive. D) Temperature change is negative and enthalpy change is negative. Show Answer Correct Answer: B) Temperature change is positive and enthalpy change is negative. 21. Sealed pneumatic piston is an example of ..... system. A) Open. B) Closed. C) Isolated. D) None of the above. Show Answer Correct Answer: B) Closed. 22. ..... is the amount of energy that must be added to a material to raise one unit of mass by one temperature unit. A) Specific Heat. B) Hotness. C) Temperature. D) Radiation. Show Answer Correct Answer: A) Specific Heat. 23. Nikita is studying the efficiency of a heat pump and learns that the COP of a heat pump is equal to the COP of a refrigerator plus ..... A) 2. B) 4. C) 1. D) 3. Show Answer Correct Answer: C) 1. 24. The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and A) Mass. B) Pressure. C) Force. D) Work done. Show Answer Correct Answer: D) Work done. 25. Enthalpy of a reaction is determined at A) 298 K and 1 atm pressure. B) 298 K and 2 atm pressure. C) 288 K and 1 atm pressure. D) 288 K and 2 atm pressure. Show Answer Correct Answer: A) 298 K and 1 atm pressure. 26. Which of the following processes is an example of an exothermic reaction? A) Photosynthesis. B) Combustion of gasoline. C) Evaporation of water. D) Melting of ice. Show Answer Correct Answer: B) Combustion of gasoline. 27. ..... thermometer is called as standard thermometer A) Gas thermometer. B) Resistance thermometer. C) Radiation thermometer. D) Liquid thermometer. Show Answer Correct Answer: A) Gas thermometer. 28. ML of 4.0$^\circ$C water is heated until its temperature is 37$^\circ$C. If the specific heat of water is 4.184 J/g$^\circ$C, calculate the amount of heat energy needed to cause this rise in temperature. A) 13, 807.2 J. B) 17, 154.4 J. C) -13, 807.2 J. D) -17, 154.4 J. Show Answer Correct Answer: A) 13, 807.2 J. 29. Which principle allows us to calculate the change in enthalpy of a reaction using Hess's Law? A) Conservation of energy. B) Conservation of entropy. C) Conservation of momentum. D) Conservation of mass. Show Answer Correct Answer: A) Conservation of energy. 30. Identify the incorrect statement among the following.-A:Enthalpy change for a reaction is the heat absorbed or released under constant pressure.-B:The enthalpy change of a reaction is independent of the path taken and depends only on the initial and final states.-C:Endothermic reactions are characterized by a negative enthalpy change. A) A. B) B. C) C. D) None of the above. Show Answer Correct Answer: C) C. 31. Efficiency of Carnot's Engine does not depends upon A) Temperature of source. B) Temperature of sink. C) Working substance. D) None of the above. Show Answer Correct Answer: C) Working substance. 32. How much heat does an aluminum block absorb if 10.00 grams ae heated from 25.0$^{o}$C to 50.0$^{o}$C? the specific heat of aluminum is 0.900J/g$^{o}$C A) 225. B) 450. C) -225. D) -450. Show Answer Correct Answer: A) 225. 33. If the volume of a gas is reduced to half of its initial volume then the specific heat will be A) Increase four times. B) Remains constant. C) Doubled. D) Reduced to half. Show Answer Correct Answer: B) Remains constant. 34. In the formula of The First Law of Thermodynamics, the ''Q" represent: A) Change in internal energy. B) Energy transferred as heat. C) Work done on or by the system. D) None of the above. Show Answer Correct Answer: B) Energy transferred as heat. 35. Transfer of heat by means of electromagnetic waves A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: C) Radiation. 36. The product of the pressure and volume of a system has the same SI units as which one of the following choices? A) Work. B) Force. C) Acceleration. D) Momentum. E) Impulse. Show Answer Correct Answer: A) Work. 37. Absorbs energy(nonspontaneous) A) Exergonic reaction. B) Endergonic reaction. C) Photosynthesis. D) Metabolism. Show Answer Correct Answer: B) Endergonic reaction. 38. The 1st law of Thermodynamics A) Energy can not be created or destroyed. It just changes forms. B) Energy can only be created by the sun. C) Some energy is lost to the environment. D) None of the above. Show Answer Correct Answer: A) Energy can not be created or destroyed. It just changes forms. 39. A) Maximum work is obtainable in A) Adiabatic process. B) Irreversible process. C) Isothermal process. D) Reversible process. Show Answer Correct Answer: D) Reversible process. 40. A student calculates the heat of combustion of a biscuit from an experiment to be 28.5kJ /g. The packet suggest that the heat of combustion is 3020kJ/100g. What is the percentage efficiency experimental data A) 94%. B) 16%. C) 0.94%. D) 9.4. Show Answer Correct Answer: A) 94%. 41. Tisha is studying thermodynamics and comes across a concept:A body of infinite heat capacity, capable of supplying any amount of heat without undergoing any temperature change A) Low temperature source. B) High temperature source. C) Low temperature sink. D) High temperature sink. Show Answer Correct Answer: B) High temperature source. 42. What is the source temperature of the Carnot engine in K required to get 70% efficiency? Given sink temperature is 27 degree C. A) 727 K. B) 90 K. C) 270 K. D) 1000 K. Show Answer Correct Answer: D) 1000 K. 43. Entropy is a measure of: A) Order. B) Disorder. C) All the above. D) None of the above. Show Answer Correct Answer: B) Disorder. 44. Temperature of the Sun is measured by ..... A) Resistance thermometer. B) Pyrometer. C) Mercury thermometer. D) Gas Thermometer. Show Answer Correct Answer: B) Pyrometer. 45. What is the formula to convert Fahrenheit to Celsius? A) F= (1.8xC) + 32. B) K= C + 273. C) C = (F-32) / 1.8. D) C= K-273. Show Answer Correct Answer: C) C = (F-32) / 1.8. 46. Which example below is an example of convection? A) Standing on a hot metal bridge. B) The attic is warmer than the basement. C) The Sun heating the Earth. D) Touching hot sand with your feet. Show Answer Correct Answer: B) The attic is warmer than the basement. 47. How many laws of thermodynamics are there? A) A lot. B) 3. C) 1. D) 4. Show Answer Correct Answer: D) 4. 48. Measure of the average kinetic energy of all the particles that make up an object. A) Thermal energy. B) Specific heat. C) Heat. D) Temperature. E) Thermodynamics. Show Answer Correct Answer: D) Temperature. 49. Amount of energy required to raise the temperature of a substance of 1 Kg mass by 1$^{0}$C is called A) Latent Heat. B) Specific heat capacity. C) Specific entropy. D) Sensible heat. Show Answer Correct Answer: B) Specific heat capacity. 50. The substance with the smallest value of molar entropy (S$^{o}$) is A) MgCl$_{2}$. B) SnCl$_{4}$. C) AlCl$_{3}$. D) NaCl. Show Answer Correct Answer: D) NaCl. 51. Define entropy and its significance in thermodynamics. A) Entropy is irrelevant in thermodynamic processes. B) Entropy quantifies the temperature of a system. C) Entropy is a measure of disorder in a system, significant for understanding energy distribution and the direction of thermodynamic processes. D) Entropy is a measure of energy in a system. Show Answer Correct Answer: C) Entropy is a measure of disorder in a system, significant for understanding energy distribution and the direction of thermodynamic processes. 52. Transfer of heat in a gas or liquid by the motion of particles in the heated fluid A) Conduction. B) Convection. C) Radiation. D) None of the above. Show Answer Correct Answer: B) Convection. 53. The SI unit for measuring heat is the A) Joule. B) Calorie. C) Pascal. D) Newton. Show Answer Correct Answer: A) Joule. 54. Which of the following is an example of an endothermic process? A) Freezing of water. B) Combustion of gasoline. C) Condensation of steam. D) Melting of ice. Show Answer Correct Answer: D) Melting of ice. 55. The quantity responsible for heat flow is A) Specific heat. B) Surrounding. C) Temperature. D) System. Show Answer Correct Answer: C) Temperature. 56. For an ideal gas, Cv and Cp are related as: A) Cp-Cv=R. B) Cp-Cv=RT. C) Cv-Cp = R. D) Cv+Cp=R. Show Answer Correct Answer: A) Cp-Cv=R. 57. In an isothermal process, the volume of an ideal gas is halved. One can say that the A) Work done by the gas is positive. B) Work done by the gas is negative. C) Internal energy of the system decreases. D) Internal energy of the system increases. Show Answer Correct Answer: B) Work done by the gas is negative. 58. First Law of Thermodynamics states that (keeping in mind the sign convention of IUPAC) A) $\Delta$U = W-Q. B) $\Delta$U =-W-Q. C) $\Delta$U = Q + W. D) $\Delta$U = Q-W. Show Answer Correct Answer: C) $\Delta$U = Q + W. 59. Which law of thermodynamics is used to define temperature? A) Third law. B) Zeroth law. C) Second law. D) First law. Show Answer Correct Answer: B) Zeroth law. 60. Most of real processes are A) Isothermal. B) Non-quasi-statics. C) Quasi-static. D) Adiabatic. Show Answer Correct Answer: B) Non-quasi-statics. 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