MCQOPTIONS
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MCQOPTIONS
This section includes 65 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A mixture contains 80% of NaOH and 20% H2O by weight, what is the mole fraction of NaOH? |
| A. | 0.24 |
| B. | 0.42 |
| C. | 0.64 |
| D. | 0.78 |
| Answer» D. 0.78 | |
| 2. |
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 | |
| 3. |
A mixture contains 80% of HCl and 20% H2O by weight, what is the mole fraction of HCl? |
| A. | 0.15 |
| B. | 0.29 |
| C. | 0.45 |
| D. | 0.66 |
| Answer» E. | |
| 4. |
A mixture contains 9 gram each of H2O and NaCl, what is the mole fraction of NaCl? |
| A. | 0.15 |
| B. | 0.23 |
| C. | 0.45 |
| D. | 0.64 |
| Answer» C. 0.45 | |
| 5. |
A mixture contains 23 g of ethanol and 36 g of water, some acetic acid is added to the mixture and its mole fraction becomes 0.5, how much acetic acid was added? |
| A. | 25 g |
| B. | 75 g |
| C. | 100 g |
| D. | 150 g |
| Answer» E. | |
| 6. |
If the mole fraction of SO2 in H2SO4 is 0.2, what is the ratio of mass of sulfur and oxygen in the solution? |
| A. | 0.166 |
| B. | 6 |
| C. | 1.8 |
| D. | 0.555 |
| Answer» E. | |
| 7. |
A mixture of gases SO2, O2 and 4 g of N2 and total mass of mixture is 10 g, what is the sum of mole fraction of SO2 and O2? |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1 |
| Answer» D. 1 | |
| 8. |
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 | |
| 9. |
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 | |
| 10. |
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 | |
| 11. |
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 | |
| 12. |
The velocity of water in a pipe of area 5 m2 is 10 m/s, what will be the flow rate of water? |
| A. | 25 m3/s |
| B. | 50 m3/s |
| C. | 75 m3/s |
| D. | 100 m3/s |
| Answer» C. 75 m3/s | |
| 13. |
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. | |
| 14. |
10 moles of oxygen divides and enters two reactors flow rate 45 kg/s and leaves the reactors at the flow rates of 6 kg/s and 9 kg/s, what are number of moles of oxygen that leaves the reactor with 9 kg/s? |
| A. | 180 |
| B. | 450 |
| C. | 60 |
| D. | 90 |
| Answer» E. | |
| 15. |
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 | |
| 16. |
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. | |
| 17. |
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 | |
| 18. |
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 | |
| 19. |
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 | |
| 20. |
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. | |
| 21. |
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 | |
| 22. |
What is the specific gravity of O2 at 27oC and 60 Pa with respect to 1 Kg/m3? |
| A. | 0.15 |
| B. | 0.28 |
| C. | 0.54 |
| D. | 0.76 |
| Answer» E. | |
| 23. |
What is the specific gravity of N2 at 27oC 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 | |
| 24. |
A mixture contains 20% CO2, 30% SO2 and 50% H2O, what is the mass percent of CO2? |
| A. | 23 |
| B. | 45 |
| C. | 66 |
| D. | 87 |
| Answer» B. 45 | |
| 25. |
What is the concentration of a 22 grams of carbon dioxide occupying 0.5 m3 volume? |
| A. | 1 mole/m3 |
| B. | 2 mole/m3 |
| C. | 11 mole/m3 |
| D. | 22 mole/m3 |
| Answer» B. 2 mole/m3 | |
| 26. |
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 | |
| 27. |
A mixture contains 10% CO, 40% CO2 and 50% H2O, what is the mass percent of CO2? |
| A. | 9.5 |
| B. | 15.4 |
| C. | 39.5 |
| D. | 74.1 |
| Answer» B. 15.4 | |
| 28. |
The mole percent of CO2 and H2O in a mixture is 40% and 60% respectively, what is the mass percent of CO2? |
| A. | 24.1 |
| B. | 47.2 |
| C. | 61.9 |
| D. | 78.5 |
| Answer» D. 78.5 | |
| 29. |
What is the concentration of a solution with 10 grams of calcium in 1000 m3 of water? |
| A. | 150 ppm |
| B. | 250 ppm |
| C. | 800 ppm |
| D. | 1000 ppm |
| Answer» C. 800 ppm | |
| 30. |
The mole percent of H2 and N2 in a mixture is 50% each, what is the mass percentage of H2? |
| A. | 12.5 |
| B. | 25 |
| C. | 50 |
| D. | 87.5 |
| Answer» B. 25 | |
| 31. |
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 | |
| 32. |
If a compound contains 48% of Carbon, 48% of oxygen and 8% of hydrogen by weight, then what is the possible molecular formula of the compound? |
| A. | C2H4O |
| B. | CH4O3 |
| C. | C4H4O3 |
| D. | C4H8O3 |
| Answer» E. | |
| 33. |
If hydrogen is 14% by weight in CH3(OH)x(NH3)y, then what is the possible value of x*y? |
| A. | 6 |
| B. | 12 |
| C. | 18 |
| D. | 24 |
| Answer» B. 12 | |
| 34. |
A gaseous mixture is composed of 20% CO2, 40% O2 and 40% N2. What is the mass fraction of N2? |
| A. | 0.307 |
| B. | 0.416 |
| C. | 0.529 |
| D. | 0.784 |
| Answer» B. 0.416 | |
| 35. |
A liquid mixture of O2, CH4 and CO has the composition 32% O2, 16% CH4 and 52% CO, then what is the mole fraction of CH4? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.25 |
| D. | 0.5 |
| Answer» C. 0.25 | |
| 36. |
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 | |
| 37. |
A compound contain 12% of carbon, 16% of oxygen, 28% of nitrogen, 4% of hydrogen and 40% calcium by weight, then what can be the possible formula of the compound? |
| A. | C2H3N2Ca(OH) |
| B. | CH4N4Ca2(OH) |
| C. | CH3N2Ca2(OH) |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 38. |
What is the molecular weight of a mixture that contains 25% CO2, 40% O2 and 35% N2? |
| A. | 11.2 g |
| B. | 22.4 g |
| C. | 33.6 g |
| D. | 44.8 g |
| Answer» D. 44.8 g | |
| 39. |
What is the weight of 10 moles of a mixture with composition 15% O2, 25% SO2, 30% COCl2, 25% SO3 and 5% N2? |
| A. | 124 |
| B. | 345 |
| C. | 507 |
| D. | 719 |
| Answer» E. | |
| 40. |
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 | |
| 41. |
What is the value of x in C2H8(OH)x if the percentage by weight of hydrogen is 12%? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 42. |
Calculate the number of moles in 42 grams of NaHCO3? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» B. 1 | |
| 43. |
An empty vessel has with mass 5 kg with volume 0.1 m3, is now completely filled with a liquid of density 100 kg/m3, what is the final density of the cylinder? |
| A. | 50 kg/m3 |
| B. | 100 kg/m3 |
| C. | 150 kg/m3 |
| D. | 200 kg/m3 |
| Answer» D. 200 kg/m3 | |
| 44. |
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 | |
| 45. |
What is the mass of a cube having surface area 24 m2, and density 1 kg/m3? |
| A. | 1 kg |
| B. | 2 kg |
| C. | 4 kg |
| D. | 8 kg |
| Answer» E. | |
| 46. |
What is the mass of a liquid having density 20 kg/m3, enclosed in a sphere of radius 1 m? |
| A. | 80.7 kg |
| B. | 83.7 kg |
| C. | 85.7 kg |
| D. | 88.7 kg |
| Answer» C. 85.7 kg | |
| 47. |
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 | |
| 48. |
What is the density of a liquid of mass 10 kg and contained in a cylinder of radius 5 m and surface area (excluding top and bottom) of 10p m2? |
| A. | 0.2p kg/m3 |
| B. | 0.4p kg/m3 |
| C. | 0.5p kg/m3 |
| D. | 0.6p kg/m3 |
| Answer» C. 0.5p kg/m3 | |
| 49. |
What is the density of a liquid of mass 20 kg, enclosed in a cuboid of surface areas of three sides as 1 m2, 2 m2, 5 m2, and one of its sides is 2 m? |
| A. | 1 kg/m3 |
| B. | 2 kg/m3 |
| C. | 3 kg/m3 |
| D. | 4 kg/m3 |
| Answer» C. 3 kg/m3 | |
| 50. |
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 | |