MCQOPTIONS
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MCQOPTIONS
This section includes 95 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. |
What are the number of molecules of water in CuSO₄.5H₂O, if the weight of oxygen in it is 36 grams? |
| A. | 3.25 X 10²³ |
| B. | 5.25 X 10²³ |
| C. | 7.52 X 10²³ |
| D. | 9.52 X 10²³ |
| Answer» D. 9.52 X 10²³ | |
| 52. |
What are the number of moles of Hydrogen in 158 grams of Ammonium Bicarbonate? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 53. |
What are the number of moles of hydrogen in NH₄[Cr(SCN)₄(NH₃)₂] if the weight of nitrogen in it is 49 grams? |
| A. | 3.5 |
| B. | 5 |
| C. | 7 |
| D. | 10 |
| Answer» C. 7 | |
| 54. |
What is the specific gravity of N₂ at 27°C and 6 Pa with respect to 0.1 Kg/m³? |
| A. | 0.16 |
| B. | 0.33 |
| C. | 0.51 |
| D. | 0.89 |
| Answer» C. 0.51 | |
| 55. |
What is the specific gravity of 10 Kg of water occupied in 5 m³ with respect to 100 g/m³? |
| A. | 1 |
| B. | 5 |
| C. | 10 |
| D. | 20 |
| Answer» E. | |
| 56. |
What is the specific gravity of 10 Kg of water occupied in 10 m³ with respect to 200 g/m³? |
| A. | 0.2 |
| B. | 0.5 |
| C. | 1 |
| D. | 5 |
| Answer» E. | |
| 57. |
What is the mass of a cone of radius 1 m and height 3 m having specific gravity 0.1? (Density of water = 1000 kg/m³) |
| A. | 314.16 kg |
| B. | 425.24 kg |
| C. | 136.16 kg |
| D. | 325.24 kg |
| Answer» B. 425.24 kg | |
| 58. |
What is the specific gravity of a substance with density 100 kg/m³ with respect to reference substance of density 100 lb/m³? |
| A. | 1.1 |
| B. | 2.2 |
| C. | 3.3 |
| D. | 4.4 |
| Answer» C. 3.3 | |
| 59. |
What is the unit of specific gravity? |
| A. | Kg/m³ |
| B. | N/m³ |
| C. | m/s2 |
| D. | Dimensionless |
| Answer» E. | |
| 60. |
What is the specific gravity of a substance with mass 10 kg and volume 2 m³, with respect to the reference density 50 g/m³? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» B. 0.2 | |
| 61. |
Which of the following is the unit of flow rate? |
| A. | Kg/s |
| B. | Liters/s |
| C. | Moles/s |
| D. | All of the mentioned |
| Answer» E. | |
| 62. |
A liquid is flowing through a pipe of cross section 4 m² at a rate of 4 kg/s, at a point pipe is divided into two pipes of areas of equal areas, what will be the ratio of flow rate in both the pipes? |
| A. | 1:3 |
| B. | 1:1 |
| C. | 1:2 |
| D. | 2:3 |
| Answer» C. 1:2 | |
| 63. |
Which of the following is not conserved for the flow of an incompressible liquid in a pipe with variable area? |
| A. | Mass |
| B. | Volume |
| C. | Velocity |
| D. | Flow Rate |
| Answer» D. Flow Rate | |
| 64. |
What is the volumetric flow rate if 100 kg of water is collected in 10 seconds? (Density of water = 1000 kg/m³) |
| A. | 0.1 m³/s |
| B. | 0.2 m³/s |
| C. | 0.01 m³/s |
| D. | 0.02 m³/s |
| Answer» D. 0.02 m³/s | |
| 65. |
What is the mass flow rate of a liquid flowing through a pipe of which 100 grams of water was collected in 10 seconds? |
| A. | 0.01 kg/s |
| B. | 0.05 kg/s |
| C. | 0.1 kg/s |
| D. | 0.5 kg/s |
| Answer» B. 0.05 kg/s | |
| 66. |
What is the average mass of a substance with specific gravity 10, and its volume varies with time as V = t/500, from t = 2, to t = 0 seconds? (Density of water = 1000 kg/m³) |
| A. | 25 |
| B. | 20 |
| C. | 40 |
| D. | 75 |
| Answer» C. 40 | |
| 67. |
What is the concentration of 100 lbs. of solution occupying 25 m³ of volume? |
| A. | 1.8 Kg/m³ |
| B. | 2.7 Kg/m³ |
| C. | 4 Kg/m³ |
| D. | 8 Kg/m³ |
| Answer» B. 2.7 Kg/m³ | |
| 68. |
API gravity is measured in, |
| A. | Gravity meter scale |
| B. | Hydrometer scale |
| C. | Richer scale |
| D. | None of the mentioned |
| Answer» C. Richer scale | |
| 69. |
A liquid mixture composed of 20% CH₄, 30% C₂H₄, 35% C₂H₂, and 15% C₂H₂O. What is the average molecular weight of the mixture? |
| A. | 20 |
| B. | 25 |
| C. | 6.75 |
| D. | 9.25 |
| Answer» C. 6.75 | |
| 70. |
API gravity is necessary in calculation of specific gravity of petroleum products, because |
| A. | Volume of the petroleum products changes with temperature |
| B. | Mass of petroleum products changes with temperature |
| C. | Potential energy of petroleum products changes with temperature |
| D. | None of the mentioned |
| Answer» B. Mass of petroleum products changes with temperature | |
| 71. |
A mixture contains 10 grams each of CH₄, H₂O, and SO₂, what is the mole fraction of CH₄? |
| A. | 0.14 |
| B. | 0.31 |
| C. | 0.46 |
| D. | 0.67 |
| Answer» D. 0.67 | |
| 72. |
What is the specific gravity of 5 Kg of water occupied in 10 m³ with respect to 500 g/m³? |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 5 |
| Answer» C. 2 | |
| 73. |
If the mole fraction of sodium is 0.25 in 9 moles of liquid carbon dioxide, what is the mass fraction of sodium? |
| A. | 0.10 |
| B. | 0.15 |
| C. | 0.20 |
| D. | 0.25 |
| Answer» C. 0.20 | |
| 74. |
Mass of a substance is changing with respect to its volume as m = -v³ + 3v² -2v, what is the maximum specific gravity of the substance between v = 1 m³ and v = 2 m³? (Density of reference substance = 0.25 kg/m³) |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 75. |
A liquid of density 0.1 kg/m³ is flowing through a pipe at a rate of 15 kg/s, what will be the area of the pipe if the fluid Velocity is 5 m/s? |
| A. | 30 m² |
| B. | 45 m² |
| C. | 75 m² |
| D. | 90 m² |
| Answer» B. 45 m² | |
| 76. |
A cylinder completely filled with water has density = 10 kg/m³ and volume 5 m³ , now a cube with side 1 m and density 25 kg/m³ is dipped into the cylinder with some water dropping out, what is the final density of cylinder?(neglect the mass of cylinder) |
| A. | 13 kg/m³ |
| B. | 15 kg/m³ |
| C. | 17 kg/m³ |
| D. | 19 kg/m³ |
| Answer» B. 15 kg/m³ | |
| 77. |
A mixture contains 20% NaCl, 30% CH₄ and 50% H₂O, what is the mass percent of NaCl? |
| A. | 21 |
| B. | 34 |
| C. | 45 |
| D. | 68 |
| Answer» C. 45 | |
| 78. |
A gaseous mixture composed of 20% CH₄, 30% C₂H₄, 35% C₂H₂, and 15% C₂H₂O. What is the average molecular weight of the mixture? |
| A. | 20 |
| B. | 25 |
| C. | 6.75 |
| D. | 9.25 |
| Answer» D. 9.25 | |
| 79. |
How much Sodium is there in a solution with 10 Kg of solvent (Density = 5 Kg/m³) and concentration 4 molar? |
| A. | 23 grams |
| B. | 92 grams |
| C. | 184 grams |
| D. | 276 grams |
| Answer» D. 276 grams | |
| 80. |
A neutral gas that is made of nitrogen and hydrogen only contains 7 g of nitrogen is in a mixture of with total mass 17 g, what is the mass fraction of the gas? |
| A. | 0.5 |
| B. | 0.25 |
| C. | 0.45 |
| D. | 0.8 |
| Answer» B. 0.25 | |
| 81. |
What is the specific gravity of O₂ at 27°C and 60 Pa with respect to 1 Kg/m³? |
| A. | 0.15 |
| B. | 0.28 |
| C. | 0.54 |
| D. | 0.76 |
| Answer» E. | |
| 82. |
If is necessary to mention the temperature at which specific gravity is calculated, because |
| A. | Mass of the substance changes with temperature |
| B. | Rigidity of the substance changes with temperature |
| C. | Density of the substance changes with temperature |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 83. |
A solid of density d is dropped in a liquid of density D, if d>D then, |
| A. | Solid will completely sink |
| B. | Solid will completely float |
| C. | Solid will partially sink |
| D. | None of the mentioned |
| Answer» B. Solid will completely float | |
| 84. |
10 Kg/s of a fluid with density 10 Kg/m³ is passed into a tank of capacity 50 m³, how much time will it take to fill the tank? |
| A. | 5 Second |
| B. | 50 Second |
| C. | 500 Second |
| D. | 5000 Second |
| Answer» C. 500 Second | |
| 85. |
What is the API gravity of a substance with specific gravity 1? |
| A. | 131.5 |
| B. | 141.5 |
| C. | 10 |
| D. | 50 |
| Answer» D. 50 | |
| 86. |
What is the molar concentration of a solution with 49 grams of H₂SO₄ in 0.5 liter solution? |
| A. | 1 mole/liter |
| B. | 2 mole/liter |
| C. | 3 mole/liter |
| D. | 4 mole/liter |
| Answer» B. 2 mole/liter | |
| 87. |
15 Kg/s of a fluid with density 5 Kg/m³ is passed into a tank of capacity 30 m³, how much time will it take to fill the tank? |
| A. | 3 Second |
| B. | 10 Second |
| C. | 30 Second |
| D. | 100 Second |
| Answer» C. 30 Second | |
| 88. |
24 grams of CH₄ is passed in the process in 3 minutes, what is the molar flow rate? |
| A. | 0.1 mole/min |
| B. | 0.3 mole/min |
| C. | 0.5 mole/min |
| D. | 0.7 mole/min |
| Answer» D. 0.7 mole/min | |
| 89. |
20 Kg/s of a fluid with density 5 Kg/m³ is passed into a tank of capacity 60 m³, how much time will it take to fill the tank? |
| A. | 5 Second |
| B. | 10 Second |
| C. | 15 Second |
| D. | 20 Second |
| Answer» D. 20 Second | |
| 90. |
16 grams of oxygen is passed in the process in 5 minutes, what is the molar flow rate? |
| A. | 0.1 mole/min |
| B. | 1 mole/min |
| C. | 10 mole/min |
| D. | 16 mole/min |
| Answer» B. 1 mole/min | |
| 91. |
Calculate the number of moles in 369 grams of Ca°Cl₂? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 92. |
Calculate the number of moles in 42 grams of NaHCO₃? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» B. 1 | |
| 93. |
How many atoms of carbon represent 1.5 mole? |
| A. | 6.022 X 10²³ |
| B. | 1.2044 X 10²³ |
| C. | 3.011 X 10²³ |
| D. | 9.033 X 10²³ |
| Answer» E. | |
| 94. |
How many grams of NaCl represent 1 mole? |
| A. | 23 |
| B. | 35.5 |
| C. | 58.5 |
| D. | 69.5 |
| Answer» D. 69.5 | |
| 95. |
Which of the following has the same number of moles as in 398 grams of CuSO₄? |
| A. | 2 grams of hydrogen |
| B. | 40 grams of oxygen |
| C. | 35 grams of nitrogen |
| D. | 58.5 grams of Sodium chloride |
| Answer» C. 35 grams of nitrogen | |