Explore topic-wise MCQs in Separation Processes.

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)
Discussion
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
Discussion
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.
Discussion
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
Discussion
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>
Discussion
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
Discussion
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.
Discussion
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
Discussion
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
Discussion
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.
Discussion
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
Discussion
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>
Discussion
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
Discussion