MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Separation Processes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What must be true for two coexisting liquid phases? |
| A. | YiL(1)xi(1) = YiL(2)xi(2) |
| B. | YiL(1)xi(1) = xi(2) |
| C. | YiL(1)xi(1)= YiL(2)yi(2) |
| D. | YiL(1)xi(1) = XiL(2)xi(2) |
| Answer» B. YiL(1)xi(1) = xi(2) | |
| 2. |
How does the UNIQUAC model help? |
| A. | It helps to place calculations of activity coefficients on practical basis |
| B. | It helps to place calculations of activity coefficients on theoretical basis |
| C. | It helps to place calculations of activity coefficients from graph |
| D. | It helps to provide a easier way to place calculations |
| Answer» C. It helps to place calculations of activity coefficients from graph | |
| 3. |
When is Wilson’s equation superior to Margules and Van laar equation? |
| A. | Non-ideal and immiscible mixtures |
| B. | Ideal and miscible mixtures |
| C. | Non-ideal and miscible mixtures |
| D. | Ideal and immiscible mixtures. |
| Answer» D. Ideal and immiscible mixtures. | |
| 4. |
HOW_DOES_THE_UNIQUAC_MODEL_HELP??$ |
| A. | It helps to place calculations of activity coefficients on practical basis |
| B. | It helps to place calculations of activity coefficients on theoretical basis |
| C. | It helps to place calculations of activity coefficients from graph |
| D. | It helps to provide a easier way to place calculations |
| Answer» C. It helps to place calculations of activity coefficients from graph | |
| 5. |
What_must_be_true_for_two_coexisting_liquid_phases?$ |
| A. | Y<sub>iL</sub><sup>(1)</sup>x<sub>i</sub><sup>(1)</sup> = Y<sub>iL</sub><sup>(2)</sup>x<sub>i</sub><sup>(2)</sup> |
| B. | Y<sub>iL</sub><sup>(1)</sup>x<sub>i</sub><sup>(1)</sup> = x<sub>i</sub><sup>(2)</sup> |
| C. | Y<sub>iL</sub><sup>(1)</sup>x<sub>i</sub><sup>(1)</sup>= Y<sub>iL</sub><sup>(2)</sup>y<sub>i</sub><sup>(2)</sup> |
| D. | Y<sub>iL</sub><sup>(1)</sup>x<sub>i</sub><sup>(1)</sup> = X<sub>iL</sub><sup>(2)</sup>x<sub>i</sub><sup>(2)</sup> |
| Answer» B. Y<sub>iL</sub><sup>(1)</sup>x<sub>i</sub><sup>(1)</sup> = x<sub>i</sub><sup>(2)</sup> | |
| 6. |
What is the full form of NRTL model? |
| A. | No rational two liquid model |
| B. | Non-random three liquid model |
| C. | Non-random two liquid model |
| D. | Non-Rating two liquid model |
| Answer» D. Non-Rating two liquid model | |
| 7. |
When is Wilson’s equation superior to Margules and Van laar equation?$ |
| A. | Non-ideal and immiscible mixtures |
| B. | Ideal and miscible mixtures |
| C. | Non-ideal and miscible mixtures |
| D. | Ideal and immiscible mixtures. |
| Answer» D. Ideal and immiscible mixtures. | |
| 8. |
What is the temperature dependence of van laar constant? |
| A. | A<sub>ij</sub> = A’<sub>ij</sub>/T |
| B. | A<sub>ij</sub> = A’<sub>ij</sub>R/T |
| C. | A<sub>ij</sub> = A’<sub>ij</sub>/TR |
| D. | A<sub>ij</sub> = A’<sub>ij</sub>*RT |
| Answer» B. A<sub>ij</sub> = A‚Äö√Ñ√∂‚àö√ë‚àö¬•<sub>ij</sub>R/T | |
| 9. |
In Margules equation, what is the one constant form equivalent to? |
| A. | Unsymmetrical activity coefficient curves |
| B. | Symmetrical activity coefficient curves |
| C. | Similar partial fugacity coefficients |
| D. | Dissimilar partial fugacity coefficients |
| Answer» C. Similar partial fugacity coefficients | |
| 10. |
Non-ideal solution effects can be incorporated in K-value formulations by: |
| A. | Integrating for each molecule |
| B. | Use of excess free energy |
| C. | Use of enthalpy of vaporization |
| D. | Use of partial fugacity coefficient ϕ<sub>i</sub> |
| Answer» E. | |
| 11. |
For a regular solution model what is the excess molar free enrgy dependent upon? |
| A. | Volume occupied by molecules |
| B. | Interaction of molecules |
| C. | Molecular size and intermolecular forces |
| D. | Enthalpy of formation of molecules |
| Answer» D. Enthalpy of formation of molecules | |
| 12. |
The relationship between excess molar free energy and excess molar enthalpy is: |
| A. | G<sup>E</sup> = h<sup>E</sup> – TS<sup>E</sup> |
| B. | G<sup>E</sup> = h<sup>E</sup> + TS<sup>E</sup> |
| C. | G<sup>E</sup> = – TS<sup>E</sup> |
| D. | G<sup>E</sup> = h<sup>E</sup> – T |
| Answer» B. G<sup>E</sup> = h<sup>E</sup> + TS<sup>E</sup> | |
| 13. |
Which model is used for predicting liquid-phase activity coefficients? |
| A. | Entropy models |
| B. | Enthalpy models |
| C. | Gibb’s free equation model |
| D. | Keller model |
| Answer» D. Keller model | |