Separation Processes Questions and Answers – Pervaporation

This set of Separation Processes Multiple Choice Questions & Answers (MCQs) focuses on “Pervaporation”.

1. Pervaporation method involves
a) Removal of ions
b) Production of potable water
c) Purification of aqueous streams
d) Separation and concentration of liquid mixture.
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2. When is the pervaporation preferred?
a) When feed solution is dilute in main permeant
b) When feed solution is rich in main permeant
c) When feed solution is dilute in retentate
d) When feed solution is rich in retentate
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3. Which type of membrane is required for water permeation?
a) Hydrophobic
b) Hydrophilic
c) Semipermeable
d) Permeable
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4. What factor is unaccountable in gas permeation?
a) Temperature
b) Polymer
c) Permeant
d) Concentration of permeants
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5. What are the permeant vales, if permeant flux(N)= 10
For feed side liquid: Y=0.5, x= 0.5
Vapor pressure = 100
Mole fraction of permeant vapor y= 0.25
Total permeant pressure P= 80
a) 2
b) 4
c) 5
d) 7
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6. What are the permeant vales, if permeant flux(N)= 10
For feed side liquid: Y=0.6, x= 0.5
Vapor pressure = 100
Mole fraction of permeant vapor y= 0.25
Total permeant pressure P= 80
a) 2
b) 4
c) 5
d) 1
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7. What are the permeant vales, if permeant flux(N)= 10
For feed side liquid: Y=10, x= 0.4
Vapor pressure = 100
Mole fraction of permeant vapor y= 0.5
Total permeant pressure P= 80
a) 20
b) 40
c) 50
d) 0.03
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8. What are the permeant vales, if permeant flux(N)= 10
For feed side liquid: Y=0.5, x= 0.5
Vapor pressure = 100
Mole fraction of permeant vapor y= 0.25
Total permeant pressure P= 60
a) 2
b) 41
c) 1
d) 7
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9. What are the permeant vales, if permeant flux(N)= 10
For feed side liquid: Y=0.5, x= 0.5
Vapor pressure = 200
Mole fraction of permeant vapor y= 0.25
Total permeant pressure P= 80
a) 1.33
b) 2.55
c) 5.44
d) 7
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10. Incorrect statement about pervaporation is
a) Low cost
b) Independent of vapour/liquid equilibrium
c) Suitable for heat sensible product
d) Require high temperature and high pressure.
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Sanfoundry Global Education & Learning Series – Separation Processes.

To practice all areas of Separation Processes, here is complete set of 1000+ Multiple Choice Questions and Answers.