This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which equation correctly represents the free energy change in a chemical reaction? A) $\Delta$G = $\Delta$H + T$\Delta$S. B) $\Delta$G = $\Delta$H-T$\Delta$S. C) $\Delta$G = $\Delta$T-$\Delta$H$\Delta$S. D) $\Delta$G = $\Delta$S-T$\Delta$H. Show Answer Correct Answer: B) $\Delta$G = $\Delta$H-T$\Delta$S. 2. Is burning a candle exothermic or endothermic? A) Exothermic reaction. B) Endothermic reaction. C) All the above. D) None of the above. Show Answer Correct Answer: A) Exothermic reaction. 3. In a closed system, if the internal energy decreases by 50 J and the system does 30 J of work on the surroundings, what is the amount of heat exchanged? A) 20 J absorbed by the system. B) 20 J released by the system. C) 80 J absorbed by the system. D) 80 J released by the system. Show Answer Correct Answer: B) 20 J released by the system. 4. ..... of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states. A) Heat of combustion. B) Heat of formation. C) Standard Heat of formation. D) Standard heat of reaction. Show Answer Correct Answer: C) Standard Heat of formation. 5. Is iron rusting in a moist atmosphere a spontaneous or nonspontaneous process? A) Spontaneous. B) Nonspontaneous. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nonspontaneous. 6. Energy resulting from the motion of a substance's molecules A) 1st law of thermodynamics. B) 2nd law of thermodynamics. C) Internal energy. D) None of the above. Show Answer Correct Answer: C) Internal energy. 7. For an adiabatic process A) Temperature changes are bound to occur. B) Perfect thermal insulation with surroundings are required. C) Process should be quick. D) All of the above are correct. Show Answer Correct Answer: D) All of the above are correct. 8. Is the phase change representing an exothermic or endothermic reaction?SOLID to LIQUID A) Endothermic. B) Exothermic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Endothermic. 9. What does the Zeroth Law of Thermodynamics state? A) Energy cannot be created or destroyed. B) Entropy of an isolated system always increases. C) If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other. D) It is impossible to reach absolute zero temperature. Show Answer Correct Answer: C) If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other. 10. Heat is added to a substance, but its temperature does not increase. Which one of the following statements provides the best explanation for this observation? A) The substance has unusual thermal properties. B) The substance must be cooler than its environment. C) The substance must be a gas. D) The substance must be an imperfect solid. E) The substance undergoes a change of phase. Show Answer Correct Answer: E) The substance undergoes a change of phase. 11. The shape of Carnot cycle in the temperature entropy diagram is A) Rectangle. B) Trapezium. C) Rhombus. D) Parallelogram. Show Answer Correct Answer: A) Rectangle. 12. Calculate the change in energy (in kJ) for the reaction shown below, if you begin with 150.0 grams of oxygen (O2), and the $\Delta$Hrxn =-902.0 kJ. 4 NH3(g) + 5 O2(g) $\rightarrow$ 4 NO(g) + 6 H2O(g) A) -846 kJ. B) -828 kJ. C) -423 kJ. D) -428 kJ. Show Answer Correct Answer: A) -846 kJ. 13. The value of Cv for diatomic gas is A) 3/2R. B) 5/2 R. C) 7/2R. D) 9/2 R. Show Answer Correct Answer: B) 5/2 R. 14. 2H$_{2}$O + 25 kJ $\rightarrow$ 2H$_{2 }$+ O$_{2}$ How much energy is absorbed when 36 grams of water is decomposed? A) 25 kJ. B) 50 kJ. C) 12.5 kJ. D) 900 kJ. Show Answer Correct Answer: A) 25 kJ. 15. A positive value of Joule-Thompson coefficient of a fluid means A) Temperature drops during throttling. B) Temperature remains constant during throttling. C) Temperature rises during throttling. D) None of these. Show Answer Correct Answer: A) Temperature drops during throttling. 16. An ideal calorimeter is one where A) All calories are converted into heat. B) Calories are measured carefully. C) No heat leaks out of the container. D) Temperature can be measured. Show Answer Correct Answer: C) No heat leaks out of the container. 17. There are four main processes in changing of phase, and they are A) Melting. B) Boiling. C) Condensation. D) All the above. Show Answer Correct Answer: D) All the above. 18. As the temperature of an abject increases, its molecules A) Move faster. B) Get samller (condense). C) Move farther apart (expand). D) Move faster and farther apart (expand). Show Answer Correct Answer: D) Move faster and farther apart (expand). 19. Thermodynamics process in which the temperature remains constant is known as A) Isobaric process. B) Isochoric process. C) Isovolumetric process. D) Isothermal process. Show Answer Correct Answer: D) Isothermal process. 20. Which law establishes the concept of temperature? A) 1st. B) 2nd. C) 3rd. D) Zeroeth. Show Answer Correct Answer: D) Zeroeth. 21. Which law of thermodynamics is used to understand the concept of energy conservation? A) Zeroth law. B) First law. C) Second law. D) None of these. Show Answer Correct Answer: B) First law. 22. Define the distinctive features of a 'first-order reaction': A) The duration for half of the reactants to disappear remains constant. B) When the concentration is doubled, the reaction rate also doubles. C) The rate of the reaction varies directly with the concentration. D) The rate of the reaction remains unaffected by changes in reactant concentration. Show Answer Correct Answer: B) When the concentration is doubled, the reaction rate also doubles. 23. The product of the displacement of the body and the component of force in the direction of the displacement A) Energy. B) Work. C) Heat. D) Workflow. Show Answer Correct Answer: B) Work. 24. What happens to the rate of a reaction when the concentration of reactants increases? A) The rate increases. B) The rate decreases. C) The rate remains constant. D) The rate becomes unpredictable. Show Answer Correct Answer: A) The rate increases. 25. If an ideal gas is compressed isothermally, which ofthe following statements is true? A) Energy is transferred to the gas by heat. B) No work is done on the gas. C) The temperature of the gas increases. D) The internal energy of the gas remains constant. E) None of those statements is true. Show Answer Correct Answer: D) The internal energy of the gas remains constant. ← 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 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 10Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books