This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Explain the concept of heat transfer by conduction. A) Conduction is the transfer of heat through radiation in a vacuum. B) Conduction occurs only in liquids and gases, not in solids. C) Conduction is the transfer of heat through direct contact between materials, involving particle collisions and energy transfer. D) Conduction involves the movement of heat through convection currents. Show Answer Correct Answer: C) Conduction is the transfer of heat through direct contact between materials, involving particle collisions and energy transfer. 2. States that if the mechanical energy of a system is constant, the increase in the thermal energy of the system equal the sum of the thermal energy transferred into the system and the work done on the system A) 2nd law of thermodynamics. B) 1st Law of Thermodynamics. C) Thermodynamics. D) Law of heat. E) Thermal insulator. Show Answer Correct Answer: B) 1st Law of Thermodynamics. 3. Which of these are bosons? A) Protons. B) Photons. C) Electrons. D) Neutrons. Show Answer Correct Answer: B) Photons. 4. The specific heat of copper is 0.385 J/g $^\circ$C. How much thermal energy is required to increase the temperature of a 20g sample of copper from 20$^\circ$C to 50$^\circ$C? A) 231 J. B) 308 J. C) 385 J. D) 154 J. Show Answer Correct Answer: A) 231 J. 5. What is the first law of thermodynamics? A) $\Delta Q=W-E$. B) $\Delta E=W-Q$. C) $\Delta E=Q-W$. D) $\Delta Q=E-W$. Show Answer Correct Answer: C) $\Delta E=Q-W$. 6. What is thermodynamics? A) Study of the relationship between heat and other forms of energy. B) Study of the conversion of chemical energy to other forms of energy. C) Tudy of the relationship between mechanical energy to other forms of energy. D) Study of the conversion of mechanical energy to other forms of energy. Show Answer Correct Answer: A) Study of the relationship between heat and other forms of energy. 7. A measure of the average kinetic energy of the molecules in a substance A) Thermal energy. B) Temperature. C) Heat. D) None of the above. Show Answer Correct Answer: B) Temperature. 8. How does Hess's Law enable the calculation of the change in enthalpy for a reaction? A) By adding or subtracting the enthalpies of intermediate reactions. B) By measuring the volume change during the reaction. C) By analyzing the kinetics of the reaction. D) By measuring the temperature change during the reaction. Show Answer Correct Answer: A) By adding or subtracting the enthalpies of intermediate reactions. 9. Which experiment best demonstrates the first law of thermodynamics? A) Measuring the temperature change in a gas when compressed in a piston. B) Observing the melting of ice in a warm room. C) Measuring the increase in entropy when a gas expands. D) Observing the cooling of a hot cup of coffee over time. Show Answer Correct Answer: A) Measuring the temperature change in a gas when compressed in a piston. 10. Kelvin and Planck's statement describes A) Perfect heat engine. B) An unattainable perfect engine. C) Steam engine. D) All the above. Show Answer Correct Answer: B) An unattainable perfect engine. 11. Which has more entropy, a solid liquid or a gas? A) Gas. B) Liquid. C) Solid. D) None of the above. Show Answer Correct Answer: A) Gas. 12. Why can't a heat engine be 100% efficient? A) Heat is always created. B) Thermal energy decreases. C) Entropy is lost. D) No work can be done. Show Answer Correct Answer: A) Heat is always created. 13. Which of the following processes is an example of an increase in entropy? A) Condensation of steam. B) Melting of ice. C) Freezing of water. D) Formation of a crystal. Show Answer Correct Answer: B) Melting of ice. 14. The 1st Law of Thermodynamics says that temperature exists A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 15. Energy cannot be changed without a loss of useable energy (heat) . A) First Law of Thermodynamics. B) Second Law of Thermodynamics. C) All the above. D) None of the above. Show Answer Correct Answer: B) Second Law of Thermodynamics. 16. What is the phase of water when its temperature is 150 $^\circ$C? A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: C) Gas. 17. Explain the process of phase change from liquid to gas. A) The phase change from liquid to gas is called condensation. B) Vaporization occurs when a gas cools down and turns into a liquid. C) The phase change from liquid to gas is called vaporization, which occurs when a liquid absorbs enough energy to overcome intermolecular forces. D) The process of liquid turning into gas is known as sublimation. Show Answer Correct Answer: C) The phase change from liquid to gas is called vaporization, which occurs when a liquid absorbs enough energy to overcome intermolecular forces. 18. Choose the correct alternative: A) Kinetic energy is not an ability to do work. B) A person writing on her notebook is the same "work" as the scientific term "work" . C) Energy is not related to work. D) Energy is the ability to do work. Show Answer Correct Answer: D) Energy is the ability to do work. 19. In a free expansion process A) Work done is zero. B) Heat transfer is zero. C) Both (a) and (b) above. D) Work done is zero but heat increases. Show Answer Correct Answer: C) Both (a) and (b) above. 20. How much heat is released when 5.00 g of propane (M=44.11g/mol) combusts? The heat of combustion for propane is-2220 kJ/mol. A) 252 kJ. B) 11100 kJ. C) 84.0 kJ. D) 50.3 kJ. Show Answer Correct Answer: A) 252 kJ. 21. Which process involves the transfer of heat through the direct contact of adjacent molecules? A) Sublimation. B) Convection. C) Conduction. D) Radiation. Show Answer Correct Answer: C) Conduction. 22. Which real-world application is an example of the third law of thermodynamics? A) A heat engine converting thermal energy into mechanical work. B) A superconducting material exhibiting zero electrical resistance at absolute zero. C) A solar panel converting sunlight into electrical energy. D) A refrigerator cooling food by removing heat from its interior. Show Answer Correct Answer: B) A superconducting material exhibiting zero electrical resistance at absolute zero. 23. Three moles of a diatomic gas are heated from 127$^\circ$C to 727$^\circ$C at a constant pressure of 1 atm. Find the amount of heat released. A) 37, 400 J. B) 52, 400 J. C) 22, 400 J. D) 56, 100 J. Show Answer Correct Answer: B) 52, 400 J. 24. The average speed of the atoms of a gas at 100K is 200 m/s. What would most likely be the average speed of the atoms at 200K? A) 140 m/s. B) 200 m/s. C) 67 m/s. D) 350 m/s. Show Answer Correct Answer: D) 350 m/s. 25. Heat transfer [blank] occurs from hot to cold. A) Always. B) Never. C) Rarely. D) Sometimes. Show Answer Correct Answer: A) Always. 26. ..... ? ..... is the amount of energy required to raise the temperature of 1 gram of any substance 1$^{o}$C. A) Specific heat. B) Conduction. C) Thermal energy. D) A calorie. Show Answer Correct Answer: A) Specific heat. 27. Which of the following is not a thermodynamical variable A) Hight. B) Temperature. C) Volume. D) Entropy. Show Answer Correct Answer: A) Hight. 28. Device that converts some thermal energy into mechanical energy. A) Internal combustion engine. B) Thermal insulator. C) Enegine. D) Heat engine. E) Solar collector. Show Answer Correct Answer: D) Heat engine. 29. The ..... Law of Thermodynamics says that heat always flows from an object with a higher temperature to an object of lower temperature naturally A) First. B) Third. C) Second. D) Zeroth. Show Answer Correct Answer: C) Second. 30. Work is ..... when work is done ON the system BY the surroundings A) Positive. B) Negative. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Positive. 31. The more widely spread out energy is among available energy levels and particles, the more probable that state. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 32. Which key term is most accurately described as 'the amount of energy required to heat 1g of a substance by a temperature of 1oC'? A) Heating capacity. B) Specific Heat Capacity. C) Specific heat. D) Heating energy. Show Answer Correct Answer: B) Specific Heat Capacity. 33. What is the third law of thermodynamics? A) A perfect crystal has infinite entropy at absolute zero. B) As temperature increases, entropy decreases. C) As temperature approaches absolute zero, the entropy of a perfect crystal approaches zero. D) Entropy remains constant at all temperatures. Show Answer Correct Answer: C) As temperature approaches absolute zero, the entropy of a perfect crystal approaches zero. 34. When two gases combine to form a new gas as seen below, entropy decreases due the smaller number of gas molecules in the product. Which law of thermodynamics? A) 1st law of thermodynamics. B) Zeroth Law. C) 3rd law of thermodynamics. D) 2nd law of thermodynamics. Show Answer Correct Answer: D) 2nd law of thermodynamics. 35. Absolute zero temperature is taken as A) -273$^\circ$C. B) 273$^\circ$C. C) 237$^\circ$C. D) -373$^\circ$C. Show Answer Correct Answer: A) -273$^\circ$C. 36. Heat transfer by convection occurs when ..... A) Large numbers of atoms move from place to place. B) Electrons bump into other electrons. C) Atoms give off heat in the form of electromagnetic waves. D) Electromagnetic waves travel from place to place through a vacuum. Show Answer Correct Answer: A) Large numbers of atoms move from place to place. 37. The property of a thermometer that allows it to indicate temperature is A) Heat capacity. B) Conduction. C) Thermal expansion. D) Thermal equilibrium. Show Answer Correct Answer: C) Thermal expansion. 38. A quasi-equilibrium process is a true representation of an actual process. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 39. Which of the following parameters dose not characterize the thermodynamic state of matter? A) Volume. B) Temperature. C) Pressure. D) Work. Show Answer Correct Answer: D) Work. 40. For which of these processes is the value of $\Delta$H expected to be positive? 1. The temperature increases when calcium chloride dissolves in water. 2. Steam condenses to liquid water 3. Water boils4. Dry ice sublimates A) 4 only. B) 1 only. C) 3 and 4 only. D) 2 and 3 only. Show Answer Correct Answer: C) 3 and 4 only. 41. Enthalpy of a reaction can be understood as: A) The overall energy content of a system. B) The energy necessary to disrupt bonds within reactant molecules. C) The heat flow accompanying the reaction under constant pressure conditions. D) The alteration in energy resulting from a shift in temperature. Show Answer Correct Answer: C) The heat flow accompanying the reaction under constant pressure conditions. 42. If heat flows into the system from the surrounding, heat is taken as ..... A) -q. B) +q. C) All the above. D) None of the above. Show Answer Correct Answer: B) +q. 43. Internal energy of a system is a A) Point function. B) Path function. C) All the above. D) None of the above. Show Answer Correct Answer: A) Point function. 44. Define entropy and its role in thermodynamics. A) Entropy is a measure of energy in a system. B) Entropy is the total energy of a system at equilibrium. C) Entropy is a measure of disorder in a system and indicates the direction of spontaneous processes in thermodynamics. D) Entropy is a constant value that does not change in thermodynamic processes. Show Answer Correct Answer: C) Entropy is a measure of disorder in a system and indicates the direction of spontaneous processes in thermodynamics. 45. Which of the following is an example of a heat conductor? A) Styrofoam Cup. B) The flesh of your enemies. C) Wood Logs. D) Steel Pipe. Show Answer Correct Answer: D) Steel Pipe. 46. Which among the following is the formula for Helmholtz free energy? A) U+TS. B) U-TS. C) UTV. D) U+TV. Show Answer Correct Answer: B) U-TS. 47. What is true about thermodynamically favorable reactions? A) They always have a negative $\Delta$H. B) They need outside energy to be put in. C) They always increase entropy. D) $\Delta$G is positive. Show Answer Correct Answer: A) They always have a negative $\Delta$H. 48. A system is in thermodynamic equilibrium A) If temperature and pressure at all points are same. B) If temperature and pressure at all points are not same. C) If temperature at all points are same. D) If pressure at all points are same. Show Answer Correct Answer: A) If temperature and pressure at all points are same. 49. Which combination of $\Delta$H and $\Delta$S NEVER has a spontaneous reaction? A) +$\Delta$H and +$\Delta$S. B) +$\Delta$H and-$\Delta$S. C) -$\Delta$H and-$\Delta$S. D) -$\Delta$H and +$\Delta$S. Show Answer Correct Answer: B) +$\Delta$H and-$\Delta$S. 50. A gas is heated by supplying it with 250 kJ ofenergy; at the same time, it is compressedso that 500 kJ of work is done on the gas.Calculate the change in the internal energy ofthe gas. A) 750 kJ. B) -250 kJ. C) 500 kJ. D) 250 kJ. Show Answer Correct Answer: A) 750 kJ. 51. What do we call the relationship between thermal energy, heat and work? A) Entropy. B) Closed System. C) Thermodynamics. D) Conductors. Show Answer Correct Answer: C) Thermodynamics. 52. The type of system that can exchange energy which is usually in the form of heat with its surroundings. A) Isolated system. B) Open system. C) Closed system. D) None of the above. Show Answer Correct Answer: C) Closed system. 53. Which of the following is an example of a real-world application of the second law of thermodynamics? A) A refrigerator cooling food by removing heat from inside and releasing it outside. B) A car engine converting chemical energy into mechanical energy. C) A solar panel converting sunlight into electrical energy. D) A wind turbine converting wind energy into electrical energy. Show Answer Correct Answer: A) A refrigerator cooling food by removing heat from inside and releasing it outside. 54. Which of the following cannot determine the state of a thermodynamic system? A) Pressure and volume. B) Volume and temperature. C) Temperature and pressure. D) Any one of pressure, volume or temperature. Show Answer Correct Answer: D) Any one of pressure, volume or temperature. 55. If 2 objects have the same temp. as a 3rd object, then the 2 objects must have the same temp. A) Zeroth Law of Thermodynamics. B) Third Law of Thermodynamics. C) Second Law of Thermodynamics. D) First Law of Thermodynamics. Show Answer Correct Answer: A) Zeroth Law of Thermodynamics. 56. What name is given to the process that takes place at constant temperature A) Isochoric. B) Isothermal. C) Isobaric. D) Adiabetic. Show Answer Correct Answer: B) Isothermal. 57. ..... has mass and takes up space. Liquids and gases are made of particles of this. A) Matter. B) Space. C) Temperature. D) Systems. Show Answer Correct Answer: A) Matter. 58. Transfer of thermal energy by collisions between the particles that make up matter. A) 1st law of thermodynamics. B) Convection. C) Conduction. D) 2nd law of thermodynamic. E) Radiation. Show Answer Correct Answer: C) Conduction. 59. An ideal gas system undergoes an adiabatic process in which it expands and does 20 J of work on its environment. What is the change in the system's internal energy? A) -20 J. B) 5 J. C) 0 J. D) 20 J. Show Answer Correct Answer: A) -20 J. 60. The principle used in the determination of Solar constant is A) Joule Kelvin Effect. B) Seebeck effect. C) Peltier Effect. D) Maxwell effect. Show Answer Correct Answer: B) Seebeck effect. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 8Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books