This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 6 Thermodynamics – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 17 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The pressure of an ideal gas is increased by keeping the temperature constant. What is the effect on the kinetic energy of the molecules? A) KE is zero. B) KE increases. C) KE does not change. D) KE decreases. Show Answer Correct Answer: C) KE does not change. 2. Instrument used to measure the temperature is called A) Thermometer. B) Manometer. C) Galvanometer. D) Barometer. Show Answer Correct Answer: A) Thermometer. 3. A) A system in which neither mass nor energy is exchanged with the surrounding is called A) 1) Open system. B) 2.Closed system. C) 3.Isolated system. D) 4.None of these. Show Answer Correct Answer: C) 3.Isolated system. 4. According to the second law of thermodynamics, natural processes go in the direction that ..... the total entropy of the universe. A) Increases. B) Decreases. C) Maintains. D) Increases or Decreases. Show Answer Correct Answer: A) Increases. 5. Heat transferred by currents in a liquid or gas is: A) Conduction. B) Icky. C) Convention. D) Radiation. Show Answer Correct Answer: C) Convention. 6. Which principle states that objects of different temperatures will reach thermal equilibrium when allowed to come into contact? A) Zeroth Law of Thermodynamics. B) Boyle's Law. C) Ohm's Law. D) Charles's Law. Show Answer Correct Answer: A) Zeroth Law of Thermodynamics. 7. Cyclic integral of inexact differential is A) $\ne$. B) $=$. C) All the above. D) None of the above. Show Answer Correct Answer: A) $\ne$. 8. What is the final temperature of 15 g of nickel (C=0.44 J/g$^\circ$C) that absorbs 240 J of energy at 15$^\circ$C? A) 51$^\circ$C. B) 22$^\circ$C. C) 36$^\circ$C. D) -21$^\circ$C. Show Answer Correct Answer: A) 51$^\circ$C. 9. Which of the following describes the formation of air convection currents? A) Molecules in cooler air move gaster and farther apart than those in warm air. B) Coole rair moves in over the warm air and pushes it down. C) The sun warms the land, which heats the air above it. D) All of the above. Show Answer Correct Answer: C) The sun warms the land, which heats the air above it. 10. 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. 11. Energy can never be created nor destroyed. Which law does this refer to? A) 2nd law of thermodynamics. B) 1st law of thermodynamics. C) 0th law of thermodynamics. D) 3rd law of thermodynamics. Show Answer Correct Answer: B) 1st law of thermodynamics. 12. 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. 13. In a heat engine, which law of thermodynamics is primarily applied to determine the efficiency of the engine? A) Zeroth Law of Thermodynamics. B) 1st Law of Thermodynamics. C) 2nd Law of Thermodynamics. D) 3rd Law of Thermodynamics. Show Answer Correct Answer: C) 2nd Law of Thermodynamics. 14. 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. 15. The ..... law states the entropy of a system approaches as constant value as the temperature approaches absolute zero. A) Second. B) Third. C) First. D) Zeroeth. Show Answer Correct Answer: B) Third. 16. Delta S >0 then reaction A) Non spontaneous. B) Spontaneous. C) At equilibrium. D) None of these. Show Answer Correct Answer: B) Spontaneous. 17. Entropy is maximum in A) Solid. B) Liquid. C) Gas. D) None of the above. Show Answer Correct Answer: C) Gas. 18. Which change is exothermic? A) Negative delta H. B) Temperature decreases. C) Bubbles form. D) Heat is absorbed by system. Show Answer Correct Answer: A) Negative delta H. 19. 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. 20. What is meant by the Law of Conservation of Energy'? A) Temperature at start of reaction = Temperature at end of reaction. B) Energy = Mass of products-Mass of Reactants. C) Energy lost can not be conserved. D) Energy can neither be destroyed or created. Show Answer Correct Answer: D) Energy can neither be destroyed or created. 21. This is heat required to change the temperature without changing the phase of a substance A) Latent Heat. B) Sensible Heat. C) Specific Heat. D) Heat. Show Answer Correct Answer: B) Sensible Heat. 22. 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. 23. What are the three main mechanisms of heat transfer? A) Conduction, convection, radiation. B) Compression, expansion, friction. C) Evaporation, condensation, sublimation. D) Absorption, reflection, diffusion. Show Answer Correct Answer: A) Conduction, convection, radiation. 24. In which thermodynamic process is there no flow of heat between the system and the surroundings. A) Isobaric. B) Isochoric. C) Adiabatic. D) Isothermic. Show Answer Correct Answer: C) Adiabatic. 25. In a calorimetry experiment, what is being measured? A) Temperature change. B) Pressure changes. C) Mass changes. D) Heat transfer. Show Answer Correct Answer: D) Heat transfer. 26. The enthalpies of all elements in their standard states are equal to A) <0. B) Different for each element. C) Zero. D) Unity. Show Answer Correct Answer: C) Zero. 27. 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) 0.10 MJ. B) 10.35 MJ. C) 490.44 MJ. D) 30.95 MJ. Show Answer Correct Answer: C) 490.44 MJ. 28. 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. 29. A system consisting of more than one phase is known as A) Open system. B) Non-uniform system. C) Closed system. D) Heterogeneous system. E) Isolated system. Show Answer Correct Answer: D) Heterogeneous system. 30. 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 negative so it is endothermic. D) $\Delta$H is positive so it is endothermic. Show Answer Correct Answer: A) $\Delta$H is negative so it is exothermic. 31. The state of a gas can be described by quoting the relationship between A) Temperature, amount, pressure. B) Pressure, volume, temperature. C) Pressure, volume, temperature, amount. D) Amount, volume, temperature. Show Answer Correct Answer: C) Pressure, volume, temperature, amount. 32. 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. 33. 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. 34. When it burns, a candle heats 45 grams of water from 21 to 28 C. How much energy did the candle give off? Specific heat of water is 4.184 J/gC A) 1317.96 J. B) -9225, 72 J. C) -1317.96 J. D) 9225.72J. Show Answer Correct Answer: A) 1317.96 J. 35. How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22.0$^\circ$C to 55.0$^\circ$C?Caluminum = 0.890 J/g $^\circ$C A) 3.71 J. B) 0.00270 J. C) 2.94 J. D) 294 J. Show Answer Correct Answer: D) 294 J. 36. Which factor does not influence the rate of a reaction? A) Pressure. B) Catalyst. C) Color of reactants. D) Temperature. Show Answer Correct Answer: C) Color of reactants. 37. A gas having a negative Joule-Thompson coefficient, when throttled, will A) Become cooler. B) Either be cooler or warmer depending on the type of gas. C) Become warmer. D) Remain at the same temperature. Show Answer Correct Answer: C) Become warmer. 38. In an isothermal process, the internal energy of gas molecules A) Increases. B) Decreases. C) Remains constant. D) None of the above. Show Answer Correct Answer: C) Remains constant. 39. Hot water is pumped up from deep inside Earth and is used to heat homes or to generate electricity. This describes ..... A) Biomass. B) Hydroelectric energy. C) Geothermal energy. D) None of the above. Show Answer Correct Answer: C) Geothermal energy. 40. The law of conservation of energy is the bases of ..... A) Zeroth Law. B) 3rd law of thermodynamics. C) 2nd law of thermodynamics. D) 1st law of thermodynamics. Show Answer Correct Answer: D) 1st law of thermodynamics. 41. What is the symbol for enthalpy? A) S. B) H. C) Q. D) G. Show Answer Correct Answer: B) H. 42. A piece of metal and a piece of brick are both sitting in the sun. If both are the same mass, what property of matter will make the metal feel hotter to the touch? A) Electronegativity. B) Melting point. C) Density. D) Specific heat. Show Answer Correct Answer: D) Specific heat. 43. The thermodynamic process which occurs at constant pressure is A) Isochoric. B) Isobaric. C) Isothermal. D) Isomeric. Show Answer Correct Answer: B) Isobaric. 44. The type of pressure in which its pressure value is lower than the atmospheric pressure is called as ..... A) Gauge Pressure. B) Absolute Pressure. C) Vacuum Pressure. D) Atmospheric Pressure. Show Answer Correct Answer: C) Vacuum Pressure. 45. For an engine IP more than BP A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 46. The properties of water are arranged in the steam tables as functions of A) Pressure. B) Temperature. C) Pressure and Temperature. D) None of the above. Show Answer Correct Answer: C) Pressure and Temperature. 47. What is the amount of energy required to melt 7.2 g of water at 0$^\circ$C? Water's enthalpy of fusion is 6.01 kJ/mol and water's enthalpy of vaporization is 40.7 kJ/mol. A) 2.40 kJ. B) 43.3 kJ. C) 16.3 kJ. D) 293 kJ. Show Answer Correct Answer: A) 2.40 kJ. 48. In which process there is change in internal energy of the system? A) Isothermal. B) Cyclic. C) Free expansion. D) Adiabatic. Show Answer Correct Answer: D) Adiabatic. 49. Pistons moving in a car is an example of an adiabatic process A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 50. How much heat is needed to raise the temperature of 0.3g of copper from 25$^{o}$C to 30$^{o}$C. (Specific Heat of Copper= 0.38) A) 2.3J. B) 0.33J. C) 0.57J. D) 4.5J. Show Answer Correct Answer: C) 0.57J. 51. Temperature is a measure of the ..... A) Total energy in a substance. B) Total kinetic energy in a substance. C) Average potential energy in a substance. D) Average kinetic energy of molecules in a substance. Show Answer Correct Answer: D) Average kinetic energy of molecules in a substance. 52. Two moles of an ideal gas at 300 K were cooled at constant volume so that the pressure is reduced to half the initial value. Then, as a result of heating at constant pressure, the gas has expanded till it attains the original temperature. The total heat absorbed by gas, if R is the gas constant A) 150R. B) 300R. C) 100R. D) 75R. Show Answer Correct Answer: B) 300R. 53. The study of measurement of temperature is called ..... A) Thermometry. B) Trigonometry. C) Optics. D) Calorimetry. Show Answer Correct Answer: A) Thermometry. 54. The kinetic energy of the gas molecules would be ..... in a low temperature environment. A) Much higher than expected. B) Lower. C) The same as. D) Higher. Show Answer Correct Answer: B) Lower. 55. Which law of thermodynamics defines the concept of entropy? A) Second law. B) First law. C) Third law. D) Zeroth law. Show Answer Correct Answer: A) Second law. 56. To freeze water ..... A) Energy must be added to the water. B) Energy must be removed from the water. C) All the above. D) None of the above. Show Answer Correct Answer: B) Energy must be removed from the water. 57. If I have 2 blocks of Aluminium (one of 1kg and one of 10 kg) and heat them up. Which one heats up the fastest. A) 1 kg. B) 10 kg. C) They both heat up at the same speed. D) They don't heat up. Show Answer Correct Answer: A) 1 kg. 58. What is latent heat? A) Sum of all microscopics forms of energy of a system. B) Phase change process that cannot occur without a change in the chemical composition of a system. C) Phase change process that can occur due to elevation in a gravitational field and motion. D) Phase change process that can occur without a change in the chemical composition of a system. Show Answer Correct Answer: D) Phase change process that can occur without a change in the chemical composition of a system. 59. The rate of change of free energy with respect to temperature at constant pressure is A) Negative entropy. B) Entropy. C) Negative enthalpy. D) Enthalpy. Show Answer Correct Answer: C) Negative enthalpy. 60. The internal energy change in a system that has absorbed 2Kcal of heat and done 500J of work is A) 5400J. B) 8900J. C) 6400J. D) 7900J. Show Answer Correct Answer: D) 7900J. ← 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 7Class 11 Chemistry (Part I) Chapter 6 Thermodynamics Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books