Extractive
Azeotropic
Steam
Molecular
✅ The correct answer is option B.
Chemical Engineering MCQs
In rectifying section of a continuous distillation column, the
Vapour is enriched with low boilers
Vapour is enriched with high boilers
Liquid is stripped of high boilers
None of these
✅ The correct answer is option B.
Back-trapping in a distillation column
Increases tray efficiency
Decreases tray efficiency
Reduces pressure drop
Is desirable, as it provides improved vapour-liquid contact
✅ The correct answer is option B.
Which of the following processes is not an example of adsorption applied to gaseous separations?
Recovery of valuable solvent vapors from dilute mixture with air and other gases
Dehumidification of air and gas
Removal of objectionable odour and impurities from industrial gases
Decolouration of yellow glycerene
✅ The correct answer is option D.
In distillation column design, the McCabe-Thiele procedure is inadequate and a Ponchan-Savarit procedure is needed, when
Saturated feed is not used
An azeotrope forms
The latent heat of vaporisation of the more and less volatile components are greatly different
A total condenser is used
✅ The correct answer is option D.
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of H₂/ky.Cz is around
0.6
0.24
1
0.72
✅ The correct answer is option C.
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.
Continuous
Steam
Azerotropic
None of these
✅ The correct answer is option B.
During drying of a solid, the critical moisture content increases with
Decreased drying rate
Increased thickness of the solid
Increased drying rate
Both B and C
✅ The correct answer is option D.
In case of absorption, both the operating and equilibrium lines will be straight for
Isothermal operation
Dilute solutions
Dilute solutions and isothermal operation
None of these
✅ The correct answer is option C.
The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called
Decoction
Percolation
Elutriation or elution
None of these
✅ The correct answer is option C.