This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 42 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 42 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The specific heat of aluminum is 0.9025 J/g$^\circ$C. How much heat(Q) is released when a 10.0 g piece of aluminum foil is taken out of the oven and cools from 100.0$^\circ$ to 50.0$^\circ$? A) 451 J. B) 45.1 J. C) 400 J. D) None of the above. Show Answer Correct Answer: A) 451 J. 2. What does an exergonic reaction do with energy? A) Releases Energy. B) Stores Energy. C) All the above. D) None of the above. Show Answer Correct Answer: A) Releases Energy. 3. Energy can never be created nor destroyed. Which law does this refer to? A) 0th law of thermodynamics. B) 1st law of thermodynamics. C) 2nd law of thermodynamics. D) 3rd law of thermodynamics. Show Answer Correct Answer: B) 1st law of thermodynamics. 4. If $\Delta$H and $\Delta$S are both negative or positive, then $\Delta$G has a ..... sign. A) Positive. B) Negative. C) Variable. D) None of the above. Show Answer Correct Answer: C) Variable. 5. In a heat engine, which law of thermodynamics is primarily applied to determine the efficiency of the engine? A) 1st Law of Thermodynamics. B) 2nd Law of Thermodynamics. C) 3rd Law of Thermodynamics. D) Zeroth Law of Thermodynamics. Show Answer Correct Answer: B) 2nd Law of Thermodynamics. 6. An ideal gas is one which obeys the law pv=RT at all pressures and temperatures. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. The ..... law states the entropy of a system approaches as constant value as the temperature approaches absolute zero. A) First. B) Second. C) Third. D) Zeroeth. Show Answer Correct Answer: C) Third. 8. Delta S >0 then reaction A) Non spontaneous. B) Spontaneous. C) At equilibrium. D) None of these. Show Answer Correct Answer: B) Spontaneous. 9. Entropy is maximum in A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: C) Gas. 10. Which change is exothermic? A) Negative delta H. B) Heat is absorbed by system. C) Temperature decreases. D) Bubbles form. Show Answer Correct Answer: A) Negative delta H. 11. Which is the false statement about Carnot cycle? A) All the thermal engines are based on Carnot cycle. B) It is ideal cycle. C) All the processes of Carnot cycle are reversible. D) None of the above. Show Answer Correct Answer: A) All the thermal engines are based on Carnot cycle. 12. What is meant by the Law of Conservation of Energy'? A) Energy lost can not be conserved. B) Energy can neither be destroyed or created. C) Temperature at start of reaction = Temperature at end of reaction. D) Energy = Mass of products-Mass of Reactants. Show Answer Correct Answer: B) Energy can neither be destroyed or created. 13. This is heat required to change the temperature without changing the phase of a substance A) Specific Heat. B) Latent Heat. C) Sensible Heat. D) Heat. Show Answer Correct Answer: C) Sensible Heat. 14. Why do plastic materials tend to persist in the environment even though the oxidation of these plastics in air to form carbon dioxide and water is a spontaneous process? A) Plastic materials are not affected by oxidation. B) The rate of oxidation is very slow. C) Plastic materials are not exposed to air. D) Plastic materials do not contain carbon and hydrogen. Show Answer Correct Answer: B) The rate of oxidation is very slow. 15. What are the three main mechanisms of heat transfer? A) Evaporation, condensation, sublimation. B) Compression, expansion, friction. C) Conduction, convection, radiation. D) Absorption, reflection, diffusion. Show Answer Correct Answer: C) Conduction, convection, radiation. 16. In which thermodynamic process is there no flow of heat between the system and the surroundings. A) Isobaric. B) Isothermic. C) Adiabatic. D) Isochoric. Show Answer Correct Answer: C) Adiabatic. 17. In a calorimetry experiment, what is being measured? A) Temperature change. B) Heat transfer. C) Mass changes. D) Pressure changes. Show Answer Correct Answer: B) Heat transfer. 18. The enthalpies of all elements in their standard states are equal to A) Unity. B) Different for each element. C) Zero. D) <0. Show Answer Correct Answer: C) Zero. 19. A steel billet of 2000 kg mass is to be cooled from 1250 K to 450 K. The heat released during this process is to be used as a source of energy. The ambient temperature is 303 K and specific heat of steel is 0.5 kJ/kg K. The available energy of the billet is A) 490.44 MJ. B) 30.95 MJ. C) 10.35 MJ. D) 0.10 MJ. Show Answer Correct Answer: A) 490.44 MJ. 20. Define Endothermic A) Energy is absorbed; $\Delta$H is negative; Going from Liquid to Gas, and Gas to Liquid. B) Energy is released; $\Delta$H is negative; Going from Solid to Liquid, and Liquid to Gas. C) Energy is released; $\Delta$H is positive; Going from Solid to Liquid, and Liquid to Gas. D) Energy is absorbed; $\Delta$H is positive; Going from Solid to Liquid, and Liquid to Gas. Show Answer Correct Answer: D) Energy is absorbed; $\Delta$H is positive; Going from Solid to Liquid, and Liquid to Gas. 21. A system consisting of more than one phase is known as A) Open system. B) Closed system. C) Isolated system. D) Non-uniform system. E) Heterogeneous system. Show Answer Correct Answer: E) Heterogeneous system. 22. Is the reaction exothermic or endothermic? H2 + S + O2 $\rightarrow$ H2SO4 $\Delta$H =-811.13kJ A) $\Delta$H is negative so it is exothermic. B) $\Delta$H is positive so it is exothermic. C) $\Delta$H is positive so it is endothermic. D) $\Delta$H is negative so it is endothermic. Show Answer Correct Answer: A) $\Delta$H is negative so it is exothermic. 23. The state of a gas can be described by quoting the relationship between A) Pressure, volume, temperature. B) Temperature, amount, pressure. C) Amount, volume, temperature. D) Pressure, volume, temperature, amount. Show Answer Correct Answer: D) Pressure, volume, temperature, amount. 24. An ideal gas may be taken from one state to another state with a different pressure, volume, and temperature along several different paths. Quantities that will always be the same for this process, regardless of which path is taken, include which of the following? A) I. The change in internal energy of the gas. B) II. The heat exchanged between the gas and its surroundings. C) III. The work done by the gas. D) None of the above. Show Answer Correct Answer: A) I. The change in internal energy of the gas. 25. Which tendencies favor a spontaneous reaction? A) Decreasing enthalpy and decreasing entropy. B) Decreasing enthalpy and increasing entropy. C) Increasing enthalpy and decreasing entropy. D) Increasing enthalpy and increasing entropy. Show Answer Correct Answer: B) Decreasing enthalpy and increasing entropy. ← 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