MCQOPTIONS
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MCQOPTIONS
This section includes 209 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. |
Pentane is burnt with 100% of excess air, what is the percentage of H₂O in the products? |
| A. | 12.4% |
| B. | 34.6% |
| C. | 42.1% |
| D. | 56.9% |
| Answer» D. 56.9% | |
| 52. |
How many independent equations are possible, if only one component exists in each stream? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 53. |
A reactor is supplied with 6 moles of N₂ and 9 moles of H₂, if 3 moles of NH₃ is produced, how many moles of H₂ are left at the end? |
| A. | 1.5 |
| B. | 3 |
| C. | 4.5 |
| D. | 6 |
| Answer» D. 6 | |
| 54. |
A reactor is supplied with 5 moles of C₄H₁₀, and it undergoes following reactions C₄H₁₀ + 4H₂O -> 4CO + 9H₂ and C₄H₁₀ + 6.5O₂ -> 4CO₂ + 5H₂O, if 8 moles of CO₂ was produced and 2 moles of C₄H₁₀ remains unreacted, what are the number of moles of water produced? |
| A. | 2 |
| B. | 5 |
| C. | 7.5 |
| D. | 10 |
| Answer» E. | |
| 55. |
Solution-1 at the rate F combines with solution-2 at the rate D, their combination gives the product at the rate P, what is the equation of material balance? |
| A. | F + D = P |
| B. | F – P = D |
| C. | D – F = P |
| D. | None of the mentioned |
| Answer» B. F – P = D | |
| 56. |
What is the value of H/P in the following process, if 2P + H = 16? |
| A. | 1 |
| B. | 3 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 57. |
A gas mixture of 40% He and 60% Ne is passed through a diffusion tube and the product has 10% He and 90% Ne, what is the percentage of He recovered? |
| A. | 25% |
| B. | 33.3% |
| C. | 50% |
| D. | 66.6% |
| Answer» C. 50% | |
| 58. |
A reactor is supplied with 5 moles of KNO₃ and some H₂SO₄, if the extent of reaction is 2, how many moles of H₂SO₄ were supplied? |
| A. | 1 |
| B. | 2 |
| C. | 5 |
| D. | Cannot be determined |
| Answer» E. | |
| 59. |
A reactor is supplied with two steams with equal flow rates, stream-1 containing 75% SO₂, 25% N₂ and stream-2 containing pure H₂S, if the product has 1200 grams of S, and the ratio of H₂S to H₂O is 5 and the ratio of SO₂ to H₂S is 2, what fraction of excess reagent is converted into product? |
| A. | 0.23 |
| B. | 0.55 |
| C. | 0.74 |
| D. | 0.87 |
| Answer» C. 0.74 | |
| 60. |
A reactor has feed rate of 10 Kg/ hr and 5 Kg/hr and product rate of 9 Kg/hr, what is the efficiency of the reactor? |
| A. | 10% |
| B. | 30% |
| C. | 60% |
| D. | 100% |
| Answer» D. 100% | |
| 61. |
100 Kg mol of a gas mixture input is given to a membrane with 30% O₂ and 70% N₂, the waste contains 60% of the input and the product contains 10% O₂ and 90% N₂, what are the number of moles of O₂ in the waste? |
| A. | 12 |
| B. | 16 |
| C. | 34 |
| D. | 42 |
| Answer» D. 42 | |
| 62. |
Water boiling in a container is an example of which of the following? |
| A. | Batch |
| B. | Semi-batch |
| C. | Neither of them |
| D. | Batch & Semi-batch |
| Answer» D. Batch & Semi-batch | |
| 63. |
A reactor is supplied with 10 moles of O₂ and 10 moles of H₂, if the extent of reaction is 5, how many moles of water is produced? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 64. |
A reactor is supplied with two steams with equal flow rates, stream-1 containing 75% SO₂, 25% N₂ and stream-2 containing pure H₂S, if the product has 1200 grams of S, and the ratio of H₂S to H₂O is 5 and the ratio of SO₂ to H₂S is 2, what fraction of limiting reagent is converted into product? |
| A. | 0.21 |
| B. | 0.46 |
| C. | 0.73 |
| D. | 0.83 |
| Answer» E. | |
| 65. |
Solution-1 containing 10% hydroChloric acid and 20% acetic acid at the rate F combines with Solution-2 containing 20% hydroChloric acid and 30% acetic acid at the rate D, the product formed contains 20% hydroChloric acid and 30% acetic acid at the rate P, how many independent equations containing F, D, and P are possible? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 66. |
The rate of flow in stream with 50% O₂ and 50% CO₂ is 10 mole/hr, the contained was initially filled with 10 mole of O₂, what will be the percentage of O₂ in product stream? |
| A. | 25 |
| B. | 50 |
| C. | 75 |
| D. | 100 |
| Answer» D. 100 | |
| 67. |
Water flowing in plants from tap through a pipe, the process is an example of which of the following process? |
| A. | Batch |
| B. | Semi-batch |
| C. | Neither of them |
| D. | Batch & Semi-batch |
| Answer» B. Semi-batch | |
| 68. |
A reactor is supplied with 15 moles of C, and it undergoes following reactions C + 0.5O₂ -> CO and C + O₂ -> CO₂, if 8 moles of CO₂ was produced and 3 moles of C remains unreacted, what are the number of moles of CO produced? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 69. |
10 moles of ethane is supplied with 49 moles of oxygen, what is the percentage of excess oxygen? |
| A. | 20% |
| B. | 40% |
| C. | 50% |
| D. | 70% |
| Answer» C. 50% | |
| 70. |
Two reactants enters a vessel and a reaction is carried out, it is an example of which of the following? |
| A. | Batch |
| B. | Semi-batch |
| C. | Neither of them |
| D. | Batch & Semi-batch |
| Answer» C. Neither of them | |
| 71. |
In a steady-state reactive system, 5 molar KNO₃ and 5 molar H₂SO₄ are supplied to the system, then what is the amount of K₂SO₄ produced? |
| A. | 2.5 molar |
| B. | 5 molar |
| C. | 7.5 molar |
| D. | 10 molar |
| Answer» B. 5 molar | |
| 72. |
Solution-1 containing 30% acetic acid and 20% nitrogen at the rate F combines with Solution-2 containing 20% acetic acid and 10% nitrogen at the rate D and Solution-3 containing 10% acetic acid and 30% nitrogen at the rate N the product formed contains 20% acetic acid at the rate P, what is the percentage of nitrogen in product? |
| A. | 10% |
| B. | 20% |
| C. | 30% |
| D. | Cannot be determined |
| Answer» E. | |
| 73. |
A reactor is supplied with two steams with equal flow rates, stream-1 containing 75% SO₂, 25% N₂ and stream-2 containing pure H₂S, if the product has 1200 grams of S, and the ratio of H₂S to H₂O is 5 and the ratio of SO₂ to H₂S is 2, how many moles of water are produced? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 74. |
The flow in rate of H₂SO₄ and NaCl in a system are 2 mole/hr each what is the flow out rate of HCl? |
| A. | 1 mole/hr |
| B. | 2 mole/hr |
| C. | 3 mole/hr |
| D. | 4 mole/hr |
| Answer» C. 3 mole/hr | |
| 75. |
A reactor supplied with CO₂ and H₂O, the product contains H₂O and H₂CO₃, if the rate of CO₂ is 10 mole, what is the percentage of H₂CO₃ in products? |
| A. | 10 |
| B. | 50 |
| C. | 75 |
| D. | 100 |
| Answer» E. | |
| 76. |
A liquid solid mixture with 20% solid and 80% liquid is input to a dryer, if the amount of evaporated water is 60% of the amount of input, what is the percentage of solid in the product? |
| A. | 40% |
| B. | 50% |
| C. | 80% |
| D. | 90% |
| Answer» C. 80% | |
| 77. |
A reactor is supplied with a 100 mole feed of composition 46% C₃H₇O₄, 44% O₂ and 10% N₂, if 50% of the limiting reagent is converted into product, what is the extent of reaction? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 78. |
The extent of a reaction is 10, and the stoichiometric coefficient of O₂ is 2.5, if the moles of O₂ entering the process is 45, what is the percentage of excess air? |
| A. | 20% |
| B. | 40% |
| C. | 60% |
| D. | 80% |
| Answer» E. | |
| 79. |
A reactor is supplied with glucose and oxygen to produce 40% CO₂, 60% H₂O, what is the ratio of glucose reacted and products? |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» C. 0.6 | |
| 80. |
A reactor is supplied with 12 moles of C, and it undergoes following reactions C + 0.5O₂ -> CO and C + O₂ -> CO₂, if 4 moles of CO₂ was produced and 4 moles of C remains unreacted, what are the number of moles of CO produced? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 81. |
In a system if, Accumulation = Input – Output + Generation – Consumption, where all the four terms are distinct and non-zero, then the system is which of the following? |
| A. | Steady-state |
| B. | Closed |
| C. | Non-reactive |
| D. | None of the mentioned |
| Answer» E. | |
| 82. |
In a system if, Accumulation = Input – Output, where both the terms are distinct and non-zero, then the system is which of the following? |
| A. | Steady-state |
| B. | Closed |
| C. | Non-reactive |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 83. |
A reactor with efficiency 50%, has the feed CO₂ and SO₂ with mass fraction 0.4 and 0.6 with the rate 10 Kg/hr, what is the rate of CO₂ in product side? |
| A. | 0.5 Kg/hr |
| B. | 1 Kg/hr |
| C. | 1.5 Kg/hr |
| D. | 2 Kg/hr |
| Answer» E. | |
| 84. |
A reactor supplied with CO₂ and H₂O, the product contains 10% H₂CO₃ and 90% H₂O, what is the feed rate of CO₂, if the rate of product is 50 mole? |
| A. | 5 mole |
| B. | 10 mole |
| C. | 25 mole |
| D. | 50 mole |
| Answer» B. 10 mole | |
| 85. |
The rate of flow in stream with 75% O₂ and 25% CO₂ is 20 mole/hr, the contained was initially filled with 5 mole of O₂, what will be the percentage of O₂ in product stream? |
| A. | 20 |
| B. | 40 |
| C. | 60 |
| D. | 80 |
| Answer» E. | |
| 86. |
50 Kg of a solid liquid mixture containing 10% solid and 90% water is left open in atmosphere, after some time the water is 80%, what is the weight of the mixture now? |
| A. | 10 Kg |
| B. | 25 Kg |
| C. | 35 Kg |
| D. | 50 Kg |
| Answer» C. 35 Kg | |
| 87. |
The rate flow in and flow out in an unsteady state process are now increased by 10 Kg/s, which will be the change in accumulation? |
| A. | 0 |
| B. | 5 Kg/s |
| C. | 10 Kg/s |
| D. | 20 Kg/s |
| Answer» B. 5 Kg/s | |
| 88. |
Which of the following remains constant in steady state system? |
| A. | Mass |
| B. | Energy |
| C. | Momentum |
| D. | Density |
| Answer» B. Energy | |
| 89. |
A semi-batch process differ from an open process in which of the following? |
| A. | Input |
| B. | Output |
| C. | Generation |
| D. | Consumption |
| Answer» C. Generation | |
| 90. |
In a batch process, 2 mole of SO₂ and 3 mole of CO₂ entered a vessel with some SO₂, if 5 mole of product leaves the vessel, what is the percentage of SO₂ in the product? |
| A. | 10% |
| B. | 20% |
| C. | 40% |
| D. | 50% |
| Answer» D. 50% | |
| 91. |
A pressure cooker is an example of which of the following? |
| A. | Closed System |
| B. | Open System |
| C. | Isolated System |
| D. | None of the mentioned |
| Answer» C. Isolated System | |
| 92. |
Desert Cooler is an example of which of the following? |
| A. | Closed System |
| B. | Open System |
| C. | Isolated System |
| D. | None of the mentioned |
| Answer» C. Isolated System | |
| 93. |
A jar filled with water is an example of which of the following? |
| A. | Closed System |
| B. | Open System |
| C. | Isolated System |
| D. | None of the mentioned |
| Answer» B. Open System | |
| 94. |
There were 10 moles of a substance present initially in a system, 5 moles were added to it and a reaction occurred so that its moles are reduced by 20%, what are the final moles of substance in the system? |
| A. | 10 |
| B. | 12 |
| C. | 15 |
| D. | 18 |
| Answer» C. 15 | |
| 95. |
10 moles of A were present in a system initially, and 12 moles of C are added to it, it undergoes the reaction 2A + 3C -> 2B, what are number of moles of B produced? |
| A. | 4 |
| B. | 5 |
| C. | 8 |
| D. | 12 |
| Answer» D. 12 | |
| 96. |
There were 15 moles of a substance present initially in a system, 25 moles were added to it and a reaction occurred so that its moles are reduced by 50%, what are the final moles of substance in the system? |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 40 |
| Answer» D. 40 | |
| 97. |
The flow in rate of A and B are 8 mole/s and 10 mole/s respectively, which under goes reaction 4A + 5B -> 3C, what is the flow out rate of C? |
| A. | 4 mole/s |
| B. | 6 mole/s |
| C. | 8 mole/s |
| D. | 10 mole/s |
| Answer» C. 8 mole/s | |
| 98. |
The flow in rate of A and B are 4 mole/s and 8 mole/s respectively, which under goes reaction A + B -> 3C, what is the flow out rate of C? |
| A. | 4 mole/s |
| B. | 8 mole/s |
| C. | 12 mole/s |
| D. | 24 mole/s |
| Answer» D. 24 mole/s | |
| 99. |
The flow in rate of A and B are 5 mole/s and 10 mole/s respectively, which under goes reaction A + 2B -> 3C, what is the flow out rate of C? |
| A. | 5 mole/s |
| B. | 10 mole/s |
| C. | 15 mole/s |
| D. | 20 mole/s |
| Answer» D. 20 mole/s | |
| 100. |
What is the accumulation in the system after 4 second if the out flow and in flow rates are 3 g/s and 8 g/s? |
| A. | 12 g |
| B. | 20 g |
| C. | 32 g |
| D. | 40 g |
| Answer» C. 32 g | |