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MCQOPTIONS
This section includes 98 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
2 mole of CH₄ reacts completely with excess air, if 25 liter of bone dry air is produced at 27°C and 5 atm, what is the humidity? |
| A. | 45% |
| B. | 80% |
| C. | 95% |
| D. | 143% |
| Answer» C. 95% | |
| 52. |
0.1 mole of CH₄ reacts completely with excess air, if 1 liter of bone dry air is produced at 27°C and 25 atm, what is the humidity? |
| A. | 4% |
| B. | 15% |
| C. | 20% |
| D. | 52% |
| Answer» D. 52% | |
| 53. |
What is the partial pressure of a 40% gas in a system with vapor pressure 1 mm Hg? |
| A. | 0.2 mm Hg |
| B. | 0.4 mm Hg |
| C. | 0.6 mm Hg |
| D. | 0.8 mm Hg |
| Answer» C. 0.6 mm Hg | |
| 54. |
What is the vapor pressure of 50% gas in a system with partial pressure 2 mm Hg? |
| A. | 1 mm Hg |
| B. | 2 mm Hg |
| C. | 4 mm Hg |
| D. | 8 mm Hg |
| Answer» D. 8 mm Hg | |
| 55. |
What is the fraction of gas in a system with partial pressure 2 mm Hg and vapor pressure 5 mm Hg? |
| A. | 0.4 |
| B. | 0.5 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» B. 0.5 | |
| 56. |
What is the partial pressure of 20% gas in a system with vapor pressure 10 mm Hg? |
| A. | 2 mm Hg |
| B. | 10 mm Hg |
| C. | 50 mm Hg |
| D. | 100 mm Hg |
| Answer» B. 10 mm Hg | |
| 57. |
What is the vapor pressure of 40% gas in a system with partial pressure 20 mm Hg? |
| A. | 5 mm Hg |
| B. | 10 mm Hg |
| C. | 20 mm Hg |
| D. | 50 mm Hg |
| Answer» E. | |
| 58. |
Q amount of heat is transferred to a system, which of the following is correct? |
| A. | Q > 0 |
| B. | Q < 0 |
| C. | Q = 0 |
| D. | Cannot say |
| Answer» B. Q < 0 | |
| 59. |
Temperature of a system is increased with no change in internal energy, if the work done by the system is 10 Joule, what amount of heat is taken out from the system? |
| A. | 10 J |
| B. | – 10 J |
| C. | 0 |
| D. | 5 J |
| Answer» C. 0 | |
| 60. |
Ratio heat transferred from 37°C to a colder body and from that body to – 11°C is 2, what is the temperature of colder body if surface areas are same for all bodies? |
| A. | – 5°C |
| B. | – 3°C |
| C. | 5°C |
| D. | 9°C |
| Answer» D. 9°C | |
| 61. |
What is the degrees of freedom of a system with 5 phases and 5 components? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 62. |
What is the degree of freedom of a system with 2 phases and 1 component? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 63. |
What is the number of phases in a system with 2 degrees of freedom and 2 components? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 64. |
What is the number of components in a system with 3 degrees of freedom and 2 phases? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 65. |
What is the degrees of freedom of a system with mixture of water and ice? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 66. |
What is the degrees of freedom of a system with pure water? |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 7 |
| Answer» B. 4 | |
| 67. |
What is the degrees of freedom of a system with mixture of water, liquid benzene and oxygen? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 68. |
What is the degrees of freedom of a system with mixture of ice, water and neon? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 69. |
What is the degrees of freedom of a system with mixture of copper pyrites, liquid benzene and helium? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 70. |
What is the degree of freedom of a gas mixture composed of CO₂, SO₂, SO₃, CH₄, H₂CO₃? |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» D. 7 | |
| 71. |
What is the degree of freedom of a gas mixture composed of O₂, H₂O and H₂O₂? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 72. |
What is the degree of freedom of a mixture composed Liquid H₂O, solid Br₂ and gaseous CO₂, NO₂? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 73. |
What is the degree of freedom of a mixture composed of liquid O₂, gaseous H₂ and ice? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 74. |
Which of the following is called for the curves following isothermal adsorbtion? |
| A. | Adsorbtion isotherm |
| B. | Adsorbate isotherm |
| C. | Adsorbent isotherm |
| D. | Absorbent isotherm |
| Answer» B. Adsorbate isotherm | |
| 75. |
25 mole of CH₄ reacts completely with excess air, if 25 liter of bone dry air is produced at 27°C and 5 atm, what is the humidity? |
| A. | 10% |
| B. | 100% |
| C. | 500% |
| D. | 1000% |
| Answer» E. | |
| 76. |
What we call a process having constant volume throughout? |
| A. | Isobaric |
| B. | Isochoric |
| C. | Isothermal |
| D. | Adiabatic |
| Answer» C. Isothermal | |
| 77. |
What is the total pressure of a system having 40% O₂ with 5 atm partial pressure and 60% N₂ with 10 atm partial pressure? |
| A. | 2 atm |
| B. | 6 atm |
| C. | 8 atm |
| D. | 10 atm |
| Answer» D. 10 atm | |
| 78. |
A piston cylinder expands from 8 liter to 12 liter with external pressure of 900 Pa, what is the work done on the system? |
| A. | 3.6 Joule |
| B. | – 3.6 Joule |
| C. | 7.2 Joule |
| D. | – 7.2 Joule |
| Answer» C. 7.2 Joule | |
| 79. |
6 mole glucose reacts completely with excess air, if 25 liter of bone dry air is produced at 27°C and 20 atm, what is the humidity? |
| A. | 20% |
| B. | 80% |
| C. | 145% |
| D. | 180% |
| Answer» E. | |
| 80. |
What is the molal humidity of a gas with pressure of gas vapor 10 mm Hg and pressure of vapor free gas 20 mm Hg? |
| A. | 25% |
| B. | 50% |
| C. | 100% |
| D. | 200% |
| Answer» C. 100% | |
| 81. |
Which of the following process P-V work in highest? |
| A. | Second derivative is negative |
| B. | Second derivative is positive |
| C. | Second derivative is zero |
| D. | All of the mentioned |
| Answer» B. Second derivative is positive | |
| 82. |
Which of the following does not change in steady state system? |
| A. | Flow in rate |
| B. | Flow out rate |
| C. | Accumulation |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 83. |
What is the fraction of a gas in a system at partial pressure 1 atm, if the 0.2 fraction of the same gas is at partial pressure 4 atm and 0.4 fraction at partial pressure 8 atm (Use Freundlich Isotherm)? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.4 |
| D. | 0.5 |
| Answer» E. | |
| 84. |
What is the fraction of a gas in a system with partial pressure 10 mm Hg, H = 25 mm Hg? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» E. | |
| 85. |
1 mole of CH₄ reacts completely with excess air, if 5 liter of bone dry air is produced at 27°C and 5 atm, what is the humidity? |
| A. | 25% |
| B. | 50% |
| C. | 100% |
| D. | 200% |
| Answer» E. | |
| 86. |
Which of the following is a state function? |
| A. | Work |
| B. | Entropy |
| C. | Heat |
| D. | None of the mentioned |
| Answer» C. Heat | |
| 87. |
Which of the following is a path function? |
| A. | Work |
| B. | Internal Energy |
| C. | Entropy |
| D. | None of the mentioned |
| Answer» B. Internal Energy | |
| 88. |
What is the partial pressure of a 70% gas in a system, if H = 5 mm Hg? |
| A. | 3.5 mm Hg |
| B. | 7 mm Hg |
| C. | 14 mm Hg |
| D. | 35 mm Hg |
| Answer» B. 7 mm Hg | |
| 89. |
Which of the following is equal to the product of humidity and mass of dry gas? |
| A. | Moles of water vapor |
| B. | Mass of water vapor |
| C. | Mass of gas vapor |
| D. | None of the mentioned |
| Answer» C. Mass of gas vapor | |
| 90. |
What is the humidity, if the mass of dry gas is 10 Kg and mass of water vapor is 5 Kg? |
| A. | 25% |
| B. | 50% |
| C. | 100% |
| D. | 200% |
| Answer» C. 100% | |
| 91. |
What is the degree of freedom of a gaseous mixture composed of CH₄, CO₂, H₂CO₃, H₂O and H₂O₂? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 92. |
What is the K value of a gas with partial pressure 10 atm and total pressure of the system is 50 atm? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 100 |
| D. | 500 |
| Answer» C. 100 | |
| 93. |
What is the degree of freedom of a system with 3 phases and 5 components? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 94. |
What is the relative saturation of a gas with partial pressure 10 mm Hg and vapor pressure 5 mm Hg? |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |
| 95. |
What is the relative humidity of a gas with partial pressure of water vapor is 5 mm Hg and vapor pressure 8 mm Hg? |
| A. | 25% |
| B. | 32.5% |
| C. | 45% |
| D. | 62.5% |
| Answer» E. | |
| 96. |
What is the relative saturation of a gas with partial pressure 38 mm Hg and vapor pressure 1 torr? |
| A. | 0.05 |
| B. | 0.5 |
| C. | 2 |
| D. | 38 |
| Answer» E. | |
| 97. |
What is the relative humidity of a gas with partial pressure of water vapor 360 Pa and vapor pressure 1 atm? |
| A. | 100% |
| B. | 225.1% |
| C. | 355.4% |
| D. | 405.9% |
| Answer» D. 405.9% | |
| 98. |
Which of the following is defined as the ratio of partial pressure and vapor pressure? |
| A. | Relative Humidity |
| B. | Molal Humidity |
| C. | Humidity |
| D. | None of the mentioned |
| Answer» B. Molal Humidity | |