371. On addition of solute in the solvent, the __________ of the solution decreases.
Boiling point
Freezing point
Vapour pressure
Both B and C
✅ The correct answer is option D.
Mass Transfer MCQs
372. The-relative volatility for separation of a non-ideal binary mixture by distillation should be
0
1
> 1
< 1
✅ The correct answer is option C.
373. In paper industry, paper is dried in a __________ dryer.
Tunnel
Heated cylinder
Conveyor
Festoon
✅ The correct answer is option B.
374. Make up water is supplied during cooling tower operation to compensate for water losses due to
Evaporation
Blowdown
Entrainment
All of the above
✅ The correct answer is option D.
375. With the lowering of equiliDrium pressure, at a given temperature, the amount of ad-sorbate on the adsorbent
Increases
Decreases
Remains same
Either A or B, depends on the system
✅ The correct answer is option B.
376. Which is the controlling factor for a drum drier?
Diffusion
Heat transfer
Both A & B
Neither A nor B
✅ The correct answer is option B.
377. Flash distillation is suitable for separating the constituents of a binary system, which
Form minimum boiling azeotrope
Have very wide boiling points
Have very close boiling points
Form constant boiling azeotrope
✅ The correct answer is option B.
378. Mass transfer co-efficient is directly proportional to DAB according to the __________ theory.
Film
Penetration
Surface-renewal
None of these
✅ The correct answer is option A.
379. In McCabe-Thiele method, at infinite reflux ratio
The overhead product is minimum
Both the operating lines coincide with diagonal
Both A & B
Neither A nor B
✅ The correct answer is option A.