This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 38 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 38 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Mark the correct option to complete the sentence:"Changing from gas to liquid is:" A) Solidification. B) Melting. C) Condensation. D) Sublimation. Show Answer Correct Answer: C) Condensation. 2. Define $\Delta$H A) Change in Specific Heat; Heat by one Degree Celsius. B) Change in Temperature; the energy we calculate; Degree Celsius. C) Change in Enthalpy; the energy/heat we calculate. D) Change in Time; time travel. Show Answer Correct Answer: C) Change in Enthalpy; the energy/heat we calculate. 3. For the same heat inpur and same compression ratio A) Otto cycle and Diesel cycle are equally efficient. B) Otto cycle is less efficient than diesel cycle. C) Efficiency depends mainly on working substance. D) None of the above. E) All of the above. Show Answer Correct Answer: D) None of the above. 4. What is the past participle of the word "Sing" A) Sing. B) Sang. C) Sung. D) None of the above. Show Answer Correct Answer: C) Sung. 5. Calculate the number of kJ required for the reaction shown below, if you begin with 90.0 grams of water (H2O), and the $\Delta$Hrxn = +571.6 kJ. 2 H2O(l) $\rightarrow$ 2 H2(g) + O2(g) A) 1428 kJ. B) 1429 kJ. C) 1048 kJ. D) 1094 kJ. Show Answer Correct Answer: A) 1428 kJ. 6. 10 moles of an ideal gas expands isothermally and reversibly from a pressure of 10 atm to 2 atm at 300K. What is the largest mass that can be lifted through a height of 1m in this expansion? A) 200kg. B) 509kg. C) 409kg. D) 121kg. Show Answer Correct Answer: B) 509kg. 7. Aarav is trying to understand how a refrigerator works. The desired effect of a refrigerator is A) Heat rejection to hot body. B) Maintain cold body temperature below hot body temperature. C) Maintain hot body temperature above cold body temperature. D) None of the above. Show Answer Correct Answer: B) Maintain cold body temperature below hot body temperature. 8. The force exerted by the system on unit area of boundaries is called A) Pressure. B) Volume. C) Density. D) Viscosity. Show Answer Correct Answer: A) Pressure. 9. Which is an example of decreasing entropy in a closed system? A) Boiling water. B) Freezing water. C) Cells in a body coming together. D) Ice melting. Show Answer Correct Answer: B) Freezing water. 10. What role does activation energy play in a reaction? A) It determines the overall energy change. B) It represents the energy barrier to start a reaction. C) It governs the rate of reaction. D) It is conserved during a reaction. Show Answer Correct Answer: B) It represents the energy barrier to start a reaction. 11. A reaction must be spontaneous if it is A) Exothermic and there is an increase in entropy. B) Exothermic and there is a decrease in entropy. C) Endothermic and there is an increase in entropy. D) Endothermic and there is a decrease in entropy. Show Answer Correct Answer: A) Exothermic and there is an increase in entropy. 12. What is the second law of thermodynamics state A) Cold air always rises. B) Hot air always rises. C) Thermal energy can be lost. D) Thermal energy always transfers to cooler objects. Show Answer Correct Answer: D) Thermal energy always transfers to cooler objects. 13. State function has definite value for each state A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. The laws of thermodynamics describes the relationship between ..... and energy and how they relate to temperature and ..... A) Mass, heat. B) Energy, heat. C) Matter, entropy. D) Entropy, energy. Show Answer Correct Answer: C) Matter, entropy. 15. Temperature is a measure of average [blank] energy of individual atoms. A) Heat. B) Potential. C) Mechanical. D) Kinetic. Show Answer Correct Answer: D) Kinetic. 16. A process which causes a decrease in entropy is A) Condensation of steam to form liquid water. B) Vaporization of liquid water to form steam. C) Dissociation of solid sodium chloride into aqueous sodium cations and chloride anions. D) Sublimation of snow to water vapor. Show Answer Correct Answer: A) Condensation of steam to form liquid water. 17. This refers to the energy gained by an object due to its momentum. Also known as energy in motion A) Weight. B) Potential Energy. C) Internal Energy. D) Kinetic Energy. Show Answer Correct Answer: D) Kinetic Energy. 18. How much heat is lost when a 64 g piece of copper cools from 375oC, to 26oC? (The specific heat of copper is 0.38452 J/g xoC) A) -8588.63 J. B) -1500.86 J. C) 8588.63 J. D) -3845.2 J. Show Answer Correct Answer: A) -8588.63 J. 19. Define W A) The amount of heat added to a system. B) The amount of work added to a system. C) The amount of heat produced by a system. D) The amount of work done by a system. Show Answer Correct Answer: D) The amount of work done by a system. 20. Mercury thermometers work based on the principal of ..... A) Thermodynamics. B) Thermal expansion. C) Thermal equilibrium. D) Specific heat capacity. Show Answer Correct Answer: B) Thermal expansion. 21. The total energy of a system equals A) Its heat and temperature. B) Its work and temperature. C) Its heat and work. D) Its heat. Show Answer Correct Answer: C) Its heat and work. 22. Heat is ..... if heat is removed from a system A) Positive. B) Negative. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Negative. 23. What is the efficiency of the machine if the input is 263 J and a the useful output is 142 J? A) 6.26%. B) 54%. C) 100%. D) 260%. Show Answer Correct Answer: B) 54%. 24. Density is equal to A) Mass x acceleration due to graviy. B) Mass / gravity. C) Volume / Mass. D) Mass / Volume. Show Answer Correct Answer: D) Mass / Volume. 25. What is a thermodynamic system? Give examples. A) A thermodynamic system is a type of engine that converts heat into work. B) A thermodynamic system is a defined region where thermodynamic processes occur. Examples include a gas in a piston, a boiling pot of water, and a thermos bottle. C) Examples of thermodynamic systems include a refrigerator and a light bulb. D) A thermodynamic system is only applicable to liquids and not gases. Show Answer Correct Answer: B) A thermodynamic system is a defined region where thermodynamic processes occur. Examples include a gas in a piston, a boiling pot of water, and a thermos bottle. ← 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