MCQOPTIONS
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MCQOPTIONS
This section includes 35 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. |
What Pi represents in the expression? |
| A. | Partial pressure of component i in the vapor phase |
| B. | Mole fraction of component i in the liquid phase |
| C. | Vapor pressure of component i at T |
| D. | None of the mentioned |
| Answer» B. Mole fraction of component i in the liquid phase | |
| 2. |
In vapor-liquid equilibrium, the component with lesser vapor pressure tends to accumulate in ______ phase. |
| A. | Vapor |
| B. | Liquid |
| C. | Solid |
| D. | None of the mentioned |
| Answer» C. Solid | |
| 3. |
What is the fraction of water vapor at 300 K and 1 atm, if the fraction of water vapor at the same pressure is 0.8 and temperature is 400 K? |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 4. |
________ is the change of vapour in a non-condensable gas. |
| A. | Saturation |
| B. | Vaporization |
| C. | Condensation |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
What is the mole fraction of vapour? |
| A. | 0.047 |
| B. | 0.057 |
| C. | 0.067 |
| D. | 0.077 |
| Answer» B. 0.057 | |
| 6. |
What is the mole fraction of air? |
| A. | 0.952 |
| B. | 852 |
| C. | 0.259 |
| D. | 0.291 |
| Answer» B. 852 | |
| 7. |
Water changes into water vapour only when boiling occurs. The statement is |
| A. | Correct |
| B. | Incorrect |
| C. | Always correct |
| D. | None of the mentioned |
| Answer» C. Always correct | |
| 8. |
Properties that do not depend on the quantity of material present, are called |
| A. | Intensive properties |
| B. | Extensive properties |
| C. | Variable properties |
| D. | None of the mentioned |
| Answer» B. Extensive properties | |
| 9. |
Gibbs phase rule is, when no chemical reaction occurs |
| A. | F – C + P = 2 |
| B. | F + C – P = 2 |
| C. | F + C + P = 2 |
| D. | F – C – P = 2Where: F: Degree of freedom, C: Number of independent component, P: Number of phases that can exist in the system |
| Answer» B. F + C – P = 2 | |
| 10. |
_________ variable does depend on how much material you have. |
| A. | Intensive |
| B. | Extensive |
| C. | Both intensive and extensive |
| D. | Neither intensive nor extensive |
| Answer» C. Both intensive and extensive | |
| 11. |
Gibbs phase rule can be applied to the systems which are in |
| A. | Saturation |
| B. | Equilibrium |
| C. | Critical state |
| D. | Supercritical state |
| Answer» C. Critical state | |
| 12. |
Phase rule is concerned only with the __________ properties of the system. |
| A. | Intensive |
| B. | Extensive |
| C. | Both intensive and extensive |
| D. | Neither intensive nor extensive |
| Answer» B. Extensive | |
| 13. |
Values of vapour at temperature and pressure exceeding those at saturation is |
| A. | Superheated vapour |
| B. | Sub-cooled vapour |
| C. | Below critical point vapour |
| D. | None of the mentioned |
| Answer» B. Sub-cooled vapour | |
| 14. |
The liquid between the melting curve and the vapour pressure curve is Sub-cooled liquid.The above given statement is |
| A. | False |
| B. | True |
| C. | Cannot be predicted for any material |
| D. | None of the mentioned |
| Answer» C. Cannot be predicted for any material | |
| 15. |
The pressure along the melting curve is |
| A. | Sublimation pressure |
| B. | Saturation pressure |
| C. | Condensation pressure |
| D. | None of the mentioned |
| Answer» B. Saturation pressure | |
| 16. |
What is the pressure of Air? |
| A. | 502 mm Hg |
| B. | 402 mm Hg |
| C. | 302 mm Hg |
| D. | 202 mm Hg |
| Answer» B. 402 mm Hg | |
| 17. |
The number of independent properties that have to be specified to determine all the intensive properties of each phase of the system of interest is the number of degrees of freedom.The above given statement is |
| A. | True |
| B. | False |
| C. | Depends on a system`s properties |
| D. | None of the mentioned |
| Answer» B. False | |
| 18. |
A ________ system is one in which no variation of conditions is possible without one phase disappearing. |
| A. | Variant |
| B. | Invariant |
| C. | Constant |
| D. | None of the mentioned |
| Answer» C. Constant | |
| 19. |
At dew point the partial pressure of the is equal to the partial pressure of the volatile liquid.The above given statements is |
| A. | Always correct |
| B. | Incorrect |
| C. | Depends on the properties of the liquid |
| D. | None of the mentioned |
| Answer» C. Depends on the properties of the liquid | |
| 20. |
What is the degree of freedom for pure liquid Benzene? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 21. |
What is the degree of freedom for a mixture of ice and vapour? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 22. |
For a pure gas, the values of F, C, and P areWhere: F: Degree of freedom, C: Number of independent component, P: Number of phases that can exist in the system |
| A. | 2, 2, 2 |
| B. | 2, 2, 1 |
| C. | 2, 1, 1 |
| D. | 1, 1, 1 |
| Answer» D. 1, 1, 1 | |
| 23. |
Representation of the different phase of a compound on a two or three dimensional graph is |
| A. | Block diagram |
| B. | Equilibrium diagram |
| C. | Phase diagram |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 24. |
Find the incorrect statement for condensation |
| A. | The change of phase from vapour to liquid |
| B. | Occurs at constant temperature and pressure |
| C. | The process appears as a point in in a P-T diagram |
| D. | All of the mentioned |
| Answer» E. | |
| 25. |
Boiling occurs at ________ temperature and _______ pressure, the process appears as a point in ____ diagram. |
| A. | Constant, constant, P-T |
| B. | Variable, constant, P-T |
| C. | Constant, variable, V-T |
| D. | Variable, variable, V-T |
| Answer» B. Variable, constant, P-T | |
| 26. |
______ is the temperature at which the vapour just begins to condense at a specified pressure, that is the value temperature along the vapour pressure curve. |
| A. | Dew point |
| B. | Bubble point |
| C. | Triple point |
| D. | Critical point |
| Answer» B. Bubble point | |
| 27. |
Positive deviation showing from Raoult's law is? |
| A. | Water - hydrochloric acid |
| B. | Acetone - chloroform |
| C. | Water - nitric acid |
| D. | Benzene - methanol |
| Answer» C. Water - nitric acid | |
| 28. |
Raoult`s law is used primarily for a component whose mole fraction approaches ________ |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1 |
| Answer» E. | |
| 29. |
Vapour pressure measures the concentration of solvent molecules in the ________ phase. |
| A. | Gas |
| B. | Liquid |
| C. | Solid |
| D. | None of the mentioned |
| Answer» B. Liquid | |
| 30. |
At high altitude the atmospheric pressure is |
| A. | High |
| B. | Low |
| C. | Same as ground |
| D. | None of the mentioned |
| Answer» C. Same as ground | |
| 31. |
Vapour pressure is dependent on |
| A. | Temperature |
| B. | Pressure |
| C. | Volume |
| D. | None of the mentioned |
| Answer» B. Pressure | |
| 32. |
For Henry`s law, Pi = HiXi, Here Pi is |
| A. | Partial pressure in the gas phase of the dilute component |
| B. | Vapour pressure in the gas phase of the dilute component |
| C. | Total ambient pressure in the gas phase of the dilute component |
| D. | None of the mentioned |
| Answer» B. Vapour pressure in the gas phase of the dilute component | |
| 33. |
Henry`s law can be applied to diluted gas dissolved in liquid.The given statement is |
| A. | Correct |
| B. | Incorrect |
| C. | Can`t predict |
| D. | None of the mentioned |
| Answer» B. Incorrect | |
| 34. |
The escaping tendency of a solvent is measured by its |
| A. | Vapour pressure |
| B. | Partial pressure |
| C. | Ambient pressure |
| D. | None of the mentioned |
| Answer» B. Partial pressure | |
| 35. |
Henry`s law is used primarily for a component whose mole fraction approaches_______ |
| A. | 0 |
| B. | 0.25 |
| C. | 0.5 |
| D. | 1 |
| Answer» B. 0.25 | |