MCQOPTIONS
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MCQOPTIONS
This section includes 30 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 container is filled with a gas at 10 atm with molar volume 1 liter/mole, if B = – 0.053 liter/mole, C = 0.0026 liter2/mole2, what is the temperature of gas? (Use virial equation, neglect higher terms) |
| A. | 128.2 K |
| B. | 156.9 K |
| C. | 198.5 K |
| D. | 243.6 K |
| Answer» B. 156.9 K | |
| 2. |
Pressure of a gas at 127oC is 10 mm Hg and the pressure at 527oC is 20 Pa, what is the value of B? |
| A. | 225.1 |
| B. | 365.5 |
| C. | 499.2 |
| D. | 554.5 |
| Answer» E. | |
| 3. |
A material's mass is given by the equation, m = 32P0.02/T0.5, where T is in Kelvin, m is in Kg and P is in mm Hg, what is the mass of material at 127oC, use A = 10, B = 6 X 103 and C = 0? |
| A. | 1.44 Kg |
| B. | 1.69 Kg |
| C. | 1.96 Kg |
| D. | 2.25 Kg |
| Answer» B. 1.69 Kg | |
| 4. |
What is the unit of 'b' in Peng Robinson equation? |
| A. | Liter/mole |
| B. | Liter2/mole2 |
| C. | Mole/Liter |
| D. | Mole2/Liter2 |
| Answer» B. Liter2/mole2 | |
| 5. |
What is the unit of ? in the SRK equation? |
| A. | Liter/mole |
| B. | Mole/Liter |
| C. | Atm(liter/mole) |
| D. | It is dimensionless |
| Answer» E. | |
| 6. |
What is the pressure of a gas at T = 227oC, it is given that A = 5, B = 4 X 104 and C = 0 if T is in kelvin and p in mm Hg? |
| A. | 0.024 mm Hg |
| B. | 0.049 mm Hg |
| C. | 0.075 mm Hg |
| D. | 0.096 mm Hg |
| Answer» C. 0.075 mm Hg | |
| 7. |
If the pressure of a gas at 27oC is 15 mm Hg, what will be its pressure at 127oC, use B = 5 X 103, C = 0, T is in kelvin and P is in mm Hg? |
| A. | 579 mm Hg |
| B. | 775 mm Hg |
| C. | 961 mm Hg |
| D. | 999 mm Hg |
| Answer» D. 999 mm Hg | |
| 8. |
What is the pressure of CO2 at 0oC, molar volume = 4 liter/mole, if B = – 0.053 liter/mole, C = 0.0026 liter2/mole2? (Use virial equation, neglect higher terms) |
| A. | 2.4 atm |
| B. | 4.1 atm |
| C. | 5.5 atm |
| D. | 6.9 atm |
| Answer» D. 6.9 atm | |
| 9. |
What is the unit of 'a' in RK equation? |
| A. | Liter/mole |
| B. | Atm(liter/mole) |
| C. | Atm(liter/mole)K0.5 |
| D. | Atm(liter/mole)K |
| Answer» D. Atm(liter/mole)K | |
| 10. |
A container has H2 at 27oC and molar volume 1 liter/mole, if a = 9.24 atm(liter/mole), b = 0.0907 liter/mole, what is the temperature of H2? (Use vander waal equation) |
| A. | 7.5 atm |
| B. | 12.4 atm |
| C. | 15.6 atm |
| D. | 17.8 atm |
| Answer» E. | |
| 11. |
A container has O2 at 5 atm and molar volume 2 liter/mole, if a = 9.24 atm(liter/mole), b = 0.0907 liter/mole, what is the temperature of O2? (Use vander waal equation) |
| A. | 140 K |
| B. | 150 K |
| C. | 170 K |
| D. | 190 K |
| Answer» D. 190 K | |
| 12. |
At triple point, vapor pressure of ice is given by ln p* = 18 - 2560/T, and vapor pressure of water is given by ln p* = 28 - 5120/T, what is the temperature at triple point? |
| A. | 225 K |
| B. | 256 K |
| C. | 320 K |
| D. | 400 K |
| Answer» C. 320 K | |
| 13. |
What is the pressure of CO2 at 325 K, if it is given that pressure at 330 K is 6 Pa, and pressure at 320 K is 4 Pa? |
| A. | 4.5 Pa |
| B. | 5 Pa |
| C. | 5.5 Pa |
| D. | 6 Pa |
| Answer» C. 5.5 Pa | |
| 14. |
The vapor pressure of a compound in a liquid phase is given by ln p* = 21 - 2800/T, and in solid phase it is given by ln p* = 28 - 3500/T, what is the sublimation temperature of the compound? |
| A. | 100 K |
| B. | 120 K |
| C. | 150 K |
| D. | 200 K |
| Answer» B. 120 K | |
| 15. |
Temperature of SO2 at 5 Pa is 395 K and at 10 Pa temperature is 420 K, what is the temperature at 6 Pa? |
| A. | 400 K |
| B. | 405 K |
| C. | 410 K |
| D. | 415 K |
| Answer» B. 405 K | |
| 16. |
The vapor pressure of liquid benzene is given by ln p* = 15 - 1280/T, and that of vapor benzene is given by ln p* = 23 - 2560/T, what is the boiling point of benzene? |
| A. | 160 K |
| B. | 200 K |
| C. | 240 K |
| D. | 300 K |
| Answer» B. 200 K | |
| 17. |
For CaOCl2, the rate of evaporation is given by W = 325p0.5M/T1.5 g/liter, where T is in K, p in mm Hg, and M is molecular weight, if its pressure is given by ln p* = 25 - 2700/T, what is the evaporation rate at T = 150 K? |
| A. | 256 g/liter |
| B. | 499 g/liter |
| C. | 571 g/liter |
| D. | 744 g/liter |
| Answer» E. | |
| 18. |
A vessel contains air and vapor H2O, if the partial pressure of vapor H2O is 4 atm and pressure of air is 1 atm, what is the fraction of vapor H2O in vessel? |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 19. |
Ethanol is burnt with required amount of O2 at atmospheric pressure, the conversion of ethanol is 100%, what is the pressure at due point? |
| A. | 0.2 atm |
| B. | 0.4 atm |
| C. | 0.6 atm |
| D. | 0.8 atm |
| Answer» D. 0.8 atm | |
| 20. |
10 KPa of water vapor at 27oC is saturated with air in a system, what is the mole fraction of air? |
| A. | 0.21 |
| B. | 0.46 |
| C. | 0.79 |
| D. | 0.91 |
| Answer» E. | |
| 21. |
A container has vapor H2O with partial pressure 9 atm, what is fraction of air in the vessel? |
| A. | 0.1 |
| B. | 0.4 |
| C. | 0.7 |
| D. | 0.9 |
| Answer» B. 0.4 | |
| 22. |
CH4 is burnt with 100% excess O2 at atmospheric pressure, if CH4 conversion is 100%, what is the pressure at dew point? |
| A. | 0.2 atm |
| B. | 0.4 atm |
| C. | 0.6 atm |
| D. | 0.8 atm |
| Answer» C. 0.6 atm | |
| 23. |
Ethane is burnt with 20% excess O2 at 2 atm, conversion rate of ethane is 50%, what is the pressure at due point? |
| A. | 0.45 atm |
| B. | 0.75 atm |
| C. | 0.9 atm |
| D. | 1 atm |
| Answer» D. 1 atm | |
| 24. |
100 KPa of water vapor at 27oC is saturated with air in a system, what is the mole fraction of air? |
| A. | 0.23 |
| B. | 0.306 |
| C. | 0.425 |
| D. | 0.503 |
| Answer» E. | |
| 25. |
The partial pressure of a system at 49oC is 125 mm Hg and saturated ammonia vapor has partial pressure 20 mm Hg at 49oC, what is the fraction of ammonia vapor in the system? |
| A. | 0.04 |
| B. | 0.08 |
| C. | 0.16 |
| D. | 0.24 |
| Answer» D. 0.24 | |
| 26. |
What is the fraction of water vapor at 27oC and 1 atm, if the fraction of water vapor at 127oC and 1 atm is 0.8? |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 27. |
A process is carried out for the feed mixture of 80% air and 20% CO2, the compressor recovered 50% of CO2, what is the exit pressure of the compressor, if the partial pressure of CO2 is 15 mm Hg? |
| A. | 135 mm Hg |
| B. | 145 mm Hg |
| C. | 175 mm Hg |
| D. | 200 mm Hg |
| Answer» B. 145 mm Hg | |
| 28. |
A process is carried out for the feed mixture of 40% air and 60% oxygen, the compressor recovered 2% of oxygen, what is the exit pressure of the compressor, if the partial pressure of oxygen vapor is 5 mm Hg? |
| A. | 2.4 mm Hg |
| B. | 4.8 mm Hg |
| C. | 6.5 mm Hg |
| D. | 8.4 mm Hg |
| Answer» B. 4.8 mm Hg | |
| 29. |
A process is carried out for the feed mixture of 50% air and 50% methane vapor, the compressor recovered 20% of methane, what is the exit pressure of the compressor, if the partial pressure of methane vapor is 25 mm Hg? |
| A. | 56.3 mm Hg |
| B. | 78.9 mm Hg |
| C. | 92.1 mm Hg |
| D. | 98.7 mm Hg |
| Answer» B. 78.9 mm Hg | |
| 30. |
If the fraction of water vapor at 27oC and 5 atm is 0.5, then what is the fraction of water vapor at 27oC and 1 atm? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.5 |
| D. | 0.8 |
| Answer» B. 0.2 | |