Less
More
Equal
Either A or B; depends on the packing height
✅ The correct answer is option B.
Mass Transfer MCQs
142. Leaching rate is independent of the
Agitation
Temperature
Particle size
None of these
✅ The correct answer is option D.
143. In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is
Equal to the heat of formation of surface compound
Equal to the heat of wetting
Zero
Called integral heat of adsorption
✅ The correct answer is option B.
144. In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the
Temperature and pressure
Concentration
Nature of the constituents
None of these
✅ The correct answer is option D.
145. In case of non-ideal gases and liquids, the molal diffusivity
Varies inversely as the pressure
Varies directly as the pressure
Is independent of pressure
Is equal to the volumetric diffusivity
✅ The correct answer is option C.
146. 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.
147. 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.
148. 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.
149. 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.
150. 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.