Discussion
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- Question
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty?
Options- A. Sieve plate column
- B. Bubble cap column
- C. Randomly packed column
- D. Wetted wall column
- Correct Answer
- Wetted wall column
- 1. Separation of two or more components of a liquid solution can not be achieved by
Options- A. fractional crystallisation
- B. liquid extraction
- C. absorption
- D. evaporation Discuss
- 2. Relative humidity is the ratio of the
Options- A. partial pressure of the vapour to the vapour pressure of the liquid at room temperature.
- B. partial pressure of the vapour to the vapour pressure of the liquid at gas temperature.
- C. actual humidity to saturation humidity.
- D. none of these Discuss
- 3. At minimum reflux ratio for a given separation
Options- A. number of plates is zero.
- B. number of plates is infinity.
- C. minimum number of the theoretical plates is required.
- D. separation is most efficient. Discuss
- 4. Stefan's law describes the mass transfer by
Options- A. diffusion
- B. bulk flow
- C. both 'a' & 'b'
- D. neither 'a' nor 'b' Discuss
- 5. Fenske equation determines the
Options- A. maximum number of ideal plates.
- B. height of the distillation column.
- C. minimum number of theoretical plates.
- D. optimum reflux ratio. Discuss
- 6. In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is
Options- A. 0.50
- B. 0.60
- C. 2
- D. 1 Discuss
- 7. The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by
Options- A. raising the temperature.
- B. lowering the total pressure.
- C. both (a) and (b).
- D. neither (a) nor (b). Discuss
- 8. Chemisorption (chemical adsorption) is
Options- A. same as "Van der Waals" adsorption.
- B. characterised by adsorption of heat.
- C. an irreversible phenomenon.
- D. a reversible phenomenon. Discuss
- 9. On addition of solute in the solvent, the __________ of the solution decreases.
Options- A. boiling point
- B. freezing point
- C. vapour pressure
- D. both (b) and (c) Discuss
- 10. In case of an absorber, the operating
Options- A. line always lies above the equilibrium curve.
- B. line always lies below the equilibrium curve.
- C. line can be either above or below the equilibrium curve.
- D. velocity is more than the loading velocity. Discuss
Mass Transfer problems
Search Results
Correct Answer: absorption
Correct Answer: partial pressure of the vapour to the vapour pressure of the liquid at gas temperature.
Correct Answer: number of plates is infinity.
Correct Answer: both 'a' & 'b'
Correct Answer: minimum number of theoretical plates.
Correct Answer: 0.50
Correct Answer: both (a) and (b).
Correct Answer: an irreversible phenomenon.
Correct Answer: both (b) and (c)
Correct Answer: line always lies above the equilibrium curve.
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