Molecular
Azeotropic
Extractive
Flash
✅ The correct answer is option C.
Mass Transfer MCQs
‘ADDUCTS’ and ‘CLATHRATES’ are used in case of
Extractive distillation
Crystallisation
Absorption
None of these
✅ The correct answer is option B.
During constant rate drying period, vaporisation rate per unit drying surface area
Decreases with time
Increases with time
Does not change with time
Does not affect the moisture content of the wet solid
✅ The correct answer is option C.
Which of the following is a suitable absorbent for removal of H₂S from natural gas?
Vetrocoke solution
Monoethanol amine (MEA)
Dilute
Hot water
✅ The correct answer is option B.
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.
Film
Surface renewal
Penetration
None of these
✅ The correct answer is option B.
Which of the following operations does not involve leaching?
Dissolving gold from ores
Dissolving pharmaceutical products from bark or roots
Dissolving sugar from the cells of the beet
Removing nicotine from its water solution by kerosene
✅ The correct answer is option D.
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will
Increase
Decrease
Remains same
Depend on saturated boiling point; may increase or decrease
✅ The correct answer is option A.
For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).
1-May
Oct-60
200-300
> 500
✅ The correct answer is option B.
In stripping section of continuous distillation column, the
Liquid is stripped of high boiler
Liquid is enriched with high boiler
Vapour is stripped of low boiler
None of these
✅ The correct answer is option B.
Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in
Viscosity with concentration
Degree of ideality of the solution
Both A & B
Neither A nor B
✅ The correct answer is option C.