This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. It is observed that the reaction producing KCl from its elements goes essentially to completion. Which of the following statements must be true about the thermodynamic favorability of the reaction? A) The reaction is favorable and enthalpy-driven. B) The reaction is favorable and entropy-driven. C) The reaction is favorable and driven by both the enthalpy and entropy changes. D) The reaction is unfavorable due to unfavorable changes in enthalpy and entropy. Show Answer Correct Answer: A) The reaction is favorable and enthalpy-driven. 2. If work is done by the system, the internal energy of the system decreases, then work done by the system is taken as ..... A) Negative. B) Positive. C) All the above. D) None of the above. Show Answer Correct Answer: A) Negative. 3. A gas contains two types of particles. Particle A has mass m and velocity v0 in the +z-direction. It collides head-on with particle B that has mass 5m and velocity 2v0 in the-z-direction. Electrostatic force then holds the particles together. What is the final velocity of the two-particle system? A) $-\frac{11}{6}v_0$. B) $-\frac{3}{2}v_0$. C) $+\frac{11}{6}v_0$. D) $+\frac{3}{2}v_0$. Show Answer Correct Answer: B) $-\frac{3}{2}v_0$. 4. If an engine is having an efficiency of 100% then it is called as A) PMM1. B) PMM2. C) PMM3. D) None of the above. Show Answer Correct Answer: B) PMM2. 5. PV =K, where P is pressure and V is volume . K is having the dimensions of A) Momentum. B) Temperature. C) Work. D) Power. Show Answer Correct Answer: C) Work. 6. Any process that increases the volume of a given mass of gas is called ..... A) Thermodynamics. B) Compression. C) Expansion. D) Specific heat. Show Answer Correct Answer: C) Expansion. 7. If the pressure inside a container of gas has decreased, it must have been caused by ..... A) Adding heat to the gas or increasing the volume of the gas. B) Adding heat to the gas or decreasing the volume of the gas. C) Removing heat from the gas or increasing the volume of the gas. D) Removing heat from the gas or decreasing the volume of the gas. Show Answer Correct Answer: C) Removing heat from the gas or increasing the volume of the gas. 8. How does heat transfer occur in a vacuum? A) Heat transfer in a vacuum occurs through radiation. B) Heat transfer in a vacuum is impossible. C) Heat transfer in a vacuum occurs through conduction. D) Heat transfer in a vacuum occurs through convection. Show Answer Correct Answer: A) Heat transfer in a vacuum occurs through radiation. 9. The Third Law of Thermodynamics indicates that the A) Entropy of a perfectly ordered pure crystal is zero at absolute zero. B) Sum of the entropies of the system plus surroundings is zero. C) Entropy of the universe increases. D) Enthalpy of the universe is constant. Show Answer Correct Answer: A) Entropy of a perfectly ordered pure crystal is zero at absolute zero. 10. A person places a metal spoon at room temperature into a bowl of hot soup. What will happen to the thermal energies of the spoon and the soup? A) Both the spoon and the soup will increase in thermal energy. B) Both the spoon and the soup will decrease in thermal energy. C) The spoon will decrease in thermal energy, and the soup will increase in thermal energy. D) The spoon will increase in thermal energy, and the soup will decrease in thermal energy. Show Answer Correct Answer: D) The spoon will increase in thermal energy, and the soup will decrease in thermal energy. 11. How much work is done by 0.020 m$^{3}$ of gas if its pressure increases by 2.0 x10$^{5}$ Pa and the volume remains constant? A) 0 J. B) 4.0 x10$^{3}$ J. C) -4.0 x 10$^{3}$ J. D) 1.0 x10$^{7}$ J. Show Answer Correct Answer: A) 0 J. 12. What is the effect of a catalyst on the rate of reaction? A) It stabilizes the products of the reaction. B) It has no effect on the rate of reaction. C) It decreases the rate of reaction. D) It increases the rate of reaction. Show Answer Correct Answer: D) It increases the rate of reaction. 13. Second law of thermodynamics is defined as a ..... A) Mass. B) Energy. C) Entropy. D) Enthalpy. Show Answer Correct Answer: C) Entropy. 14. In an endothermic reaction, what happens to the enthalpy of the system? A) It decreases. B) It fluctuates. C) It remains constant. D) It increases. Show Answer Correct Answer: D) It increases. 15. How does a refrigerator work? A) It generates cold air. B) Blows cold air into the fridge. C) Moves heat from inside the fridge to the room. D) Uses convection cells. Show Answer Correct Answer: C) Moves heat from inside the fridge to the room. 16. The properties associated with ..... system are called thermodynamic properties A) Microscopic system. B) Homogeneous system. C) Macroscopic system. D) All the above. Show Answer Correct Answer: C) Macroscopic system. 17. A system's organization is measured by ..... A) Equilibrium. B) Internal energy. C) Entropy. D) None of the above. Show Answer Correct Answer: C) Entropy. 18. ..... is an extensive property. A) Molar volume. B) Density. C) Heat capacity. D) Specific heat capacity. Show Answer Correct Answer: C) Heat capacity. 19. Heating water to turn it into steam causes which process in a steam engine? A) Compression. B) Expansion. C) All the above. D) None of the above. Show Answer Correct Answer: B) Expansion. 20. Geothermal uses ..... to heat and cool a home A) The internal energy of the earth. B) Natural gas. C) Solar energy. D) None of the above. Show Answer Correct Answer: A) The internal energy of the earth. 21. Energy that is transferred between objects due to temperature difference between those objects. A) Heat. B) Convection. C) Temperature. D) Thermal energy. E) Solar collector. Show Answer Correct Answer: A) Heat. 22. During an endothermic reaction in a beaker, if we are part of the surroundings and touched the beaker it would feel ..... A) Warm. B) Damp. C) Bubbly. D) Cold. Show Answer Correct Answer: D) Cold. 23. During an adiabatic process the square of the pressure of a gas is proportional to the fifth power of its absolute temperature. The ratio of specific heat C$_{p}$ / C$_{v}$ for that gas is: A) 5/3. B) 3/2. C) 3/5. D) 4/3. Show Answer Correct Answer: A) 5/3. 24. Which of the following is a statement of the first law of thermodynamics? A) Energy cannot be created or destroyed, only transformed. B) The efficiency of a heat engine is always less than 100%. C) Entropy of a system tends to increase. D) Heat flows from hot to cold bodies. Show Answer Correct Answer: A) Energy cannot be created or destroyed, only transformed. 25. $c_p=\left(\frac{\partial h}{\partial T}\right)_p$ A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 26. When matter heats up, what does it do? A) Expand. B) Contract. C) Melt. D) Evaporate. Show Answer Correct Answer: A) Expand. 27. Two objects with different temperatures are placed into a system. Which way will heat flow naturally? A) From the warmer object to the cooler object. B) From the cooler object to the warmer object. C) No flow will occur. D) From one object to the other regardless of temperature. Show Answer Correct Answer: A) From the warmer object to the cooler object. 28. For an isothermal process ..... A) Q=0. B) DT=0. C) DP=0. D) None of the above. Show Answer Correct Answer: B) DT=0. 29. H$_{2}$ + 1/2 O$_{2}$ $\rightarrow$ H$_{2}$O + 285kJ is an example of a(n) A) Electrical equation. B) Heat equation. C) Thermochemical equation. D) None of the above. Show Answer Correct Answer: C) Thermochemical equation. 30. A hot object is dropped into a container of cold water. What happens to the molecular motion of the hot object? What happens to the molecular motion of the cold object? A) The molecules in both objects will slow down until they come to rest. B) The molecules of the hot object slow down while the cold speed up. C) The molecules of the hot speed up while the cold slows down. D) The molecules in both objects will speed up until they reach identical speeds. Show Answer Correct Answer: B) The molecules of the hot object slow down while the cold speed up. 31. When you put a metal spoon in to a bowl of hot soup, the spoon gets heated from A) Radiation. B) Convection. C) Will power. D) Conduction. Show Answer Correct Answer: D) Conduction. 32. When liquids turn into gases, molecules must ..... A) Gain kinetic energy. B) Lose mass. C) Stay together as one strong unit of materials. D) Lose energy. Show Answer Correct Answer: A) Gain kinetic energy. 33. Which of the following laws was expressed by Nernst? A) The first law of thermodynamics. B) The second law of thermodynamics. C) The third law of thermodynamics. D) None of the above. Show Answer Correct Answer: C) The third law of thermodynamics. 34. Henry observed that a piece of iron rusts over time, even though rusting is a spontaneous reaction. This made him think that spontaneous reactions may be extremely slow. Is Henry's observation correct? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 35. Which of the following factors can influence the rate of a reaction? A) Temperature and pressure. B) Catalysts and inhibitors/intermediate. C) Concentration of reactants. D) All of the above. Show Answer Correct Answer: D) All of the above. 36. A sample of iron receives 125J of heat energy that raises the temperature of the iron 32.0$^\circ$C. What is the mass of the iron sample? A) 14.4 g. B) 8.70g. C) 50 g. D) 20 g. Show Answer Correct Answer: B) 8.70g. 37. What happens on a molecular level when heat is removed from an object? A) The temperature decreases and the molecules move faster. B) The temperature increases and the molecules move slower. C) The temperature increases and the molecules molecules move faster. D) The temperature decreases and the molecules move slower. Show Answer Correct Answer: D) The temperature decreases and the molecules move slower. 38. A thermodynamic system where matter does not cross the system boundary A) Open system. B) Closed system. C) Isolated system. D) None of the above. Show Answer Correct Answer: B) Closed system. 39. Which of the following processes is an example of heat transfer through conduction? A) Warm air rising to the ceiling. B) A microwave heating food. C) A metal spoon getting hot from a boiling pot of water. D) Sunlight warming the Earth's surface. Show Answer Correct Answer: C) A metal spoon getting hot from a boiling pot of water. 40. A reversed heat engine A) Receives heat from a low temperature region. B) Gives heat to a high temperature region. C) Receives a net inflow of work. D) All of the mentioned. Show Answer Correct Answer: D) All of the mentioned. 41. In a thermodynamic process, if the work done by the system is 50 J and the heat absorbed is 30 J, what is the change in internal energy? A) -80 J. B) 20 J. C) -20 J. D) 80 J. Show Answer Correct Answer: C) -20 J. 42. Transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from one place to another. A) Themal insulator. B) Conduction. C) Radiation. D) Heat engine. E) Convection. Show Answer Correct Answer: E) Convection. 43. The more particles a substance has at a given temperature, A) The more kelvins it has. B) The higher its temperature. C) The more degrees it has. D) The more thermal energy it has. Show Answer Correct Answer: D) The more thermal energy it has. 44. What is the amount of energy is required to raise the temperature of 43 g of liquid water from 25$^\circ$C to 55$^\circ$C? Water's specific heat is 4.18 J/g$^\circ$C. A) 5390 kJ. B) 9.88 kJ. C) 5.39 kJ. D) 4.49 kJ. Show Answer Correct Answer: C) 5.39 kJ. 45. The enthalpies of combustion of carbon and carbon monoxide are-393.5 and-283.0 kJ mol-1 respectively. The enthalpy of formation of carbon monoxide is: A) 110.5 kJ. B) -110.5 kJ. C) -676 kJ. D) 676.5 kJ. Show Answer Correct Answer: B) -110.5 kJ. 46. Close the door, you're letting the cold air out! A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 47. Human body is a ..... system A) Open. B) Closed. C) Isolated. D) None of the above. Show Answer Correct Answer: A) Open. 48. The following question has four choices out of which ONLY ONE is correct.Which of the following is incorrect regarding the first law of thermodynamics? A. It is not applicable to any cyclic process B. It is a restatement of the principle of conservation of energy C. It introduces the concept of the internal energy D. It introduces the concept of the entropy A) A and D. B) B and C. C) C and A. D) A and B. Show Answer Correct Answer: A) A and D. 49. What does the Zeroeth Law of Thermodynamics state? A) If two bodies are in thermal equilibrium with a third body, they are not in equilibrium with each other. B) If two bodies are not in thermal equilibrium, they cannot exchange heat. C) If two bodies are in thermal equilibrium, they must be at the same temperature. D) If two bodies are in thermal equilibrium with a third body, they are also in equilibrium with each other. Show Answer Correct Answer: D) If two bodies are in thermal equilibrium with a third body, they are also in equilibrium with each other. 50. Entropy of a system increases when it gains energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 51. What is a spontaneous process? A) May be reversible or irreversible depending on whether equilibrium is maintained throughout the process. B) May be reversible or irreversible depending on the value of $\Delta$S. C) Is reversible. D) Is irreversible. Show Answer Correct Answer: D) Is irreversible. 52. What happens to particles when they are heated? A) They speed up and spread out. B) They slow down and compress. C) They stop moving. D) They move closer together and speed up. Show Answer Correct Answer: A) They speed up and spread out. 53. Which law states that the change of enthalpy in a chemical reaction is the same regardless of whether the reaction takes place in one step or several steps, provided the initial and final states of the reactants and products are the same? A) Netwon's Law of Cooling. B) Joule's Law of Heating. C) Third Law of Thermodynamics. D) Hess's Law. Show Answer Correct Answer: D) Hess's Law. 54. $\Delta$H value in an endothermic reaction is a positive number. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 55. A definite area or space where some thermodynamic process takes place is known as A) Thermodynamic system. B) Thermodynamic process. C) Thermodynamic process. D) Thermodynamic cycle. Show Answer Correct Answer: A) Thermodynamic system. 56. In a closed system, if the internal energy increases by 50 J and 20 J of work is done by the system, how much heat is added to the system? A) 30 J. B) 20 J. C) 50 J. D) 70 J. Show Answer Correct Answer: D) 70 J. 57. Why can't all of the energy in a system be used to do work? A) Energy is destroyed during a process. B) Entropy causes some energy to become unavailable. C) All energy is used for heat. D) Energy is always constant and never changes. Show Answer Correct Answer: B) Entropy causes some energy to become unavailable. 58. A container holds 600 g of water at 40$^\circ$C. A block of iron is poured at 120$^\circ$C is poured in it. Minutes later the temperature of both materials reach a thermal equilibrium temperature of 60 $^\circ$C. Assume the system is thermally insulated, what is the mass of the iron block, in kg? Given:c$_{iron}$ = 0.486 kJ/kg.$^\circ$Cc$_{water}$ = 4.18 kJ/kg.$^\circ$C A) 1.20 kg. B) 1.72 kg. C) 2.96 kg. D) 0.86 kg. Show Answer Correct Answer: B) 1.72 kg. 59. If system A is in thermal equilibrium with system C and system B is also in thermal equilibrium with system C, system A and system B are in thermal equilibrium with each other. A) Zeroth Law of Thermodynamics. B) First Law of Thermodynamics. C) Third Law of Thermodynamics. D) Second Law of Thermodynamics. Show Answer Correct Answer: A) Zeroth Law of Thermodynamics. 60. If work done on a system then work done is A) Infinite. B) Zero. C) Positive. D) Negative. Show Answer Correct Answer: D) Negative. ← 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 7Class 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