A. Rectification
B. Absorption
C. Ion-exchange
D. Adsorption
Related Mcqs:
- Design calculation for multiple component distillation is done by_________________?
A. Ponchon-Savarit method
B. McCabe-Thiele method
C. Enthalpy concentration method
D. Tray to tray calculations - At equilibrium the concentration of water in vapour phase (C*) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is_________________?
A. 0.0
B. 0.2
C. 0.4
D. 1.0 - An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is__________________?
A. 0.048
B. 0.079
C. 0.122
D. 0.152 - Mechanism of moisture removal in case of freeze drying of food stuff is by ___________________?
A. Evaporation
B. Sublimation
C. Dehydration
D. Adsorption - Removal of ______________ exemplifies an adsorption unit operation?
A. Uranium from its ore
B. Water from petrol
C. Ammonia from coke oven gas
D. Mustard oil from mustard seed - Which of the following is a suitable absorbent for removal of H2S from natural gas ?
A. Vetrocoke solution
B. Monoethanolamine (MEA)
C. Dilute
D. Hot water - ‘Absorption with chemical reaction’ is involved in the removal of__________________?
A. Carbon dioxide from gaseous stream using alkaline solution
B. Benzol from coke oven gas using solar oil/wash oil
C. Ammonia from coke oven gas using refrigerated water
D. Tar from coke oven gas in primary gas coolers using chilled water - Powdery materials can be guarded against caking tendency on storage by_________________?
A. Providing irregular grain size
B. Providing minimum percentage of voids
C. Having maximum possible points of contact
D. None of these - 1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is________________________?
A. 0.4
B. 0.25
C. 0.2
D. 0.175 - Make up water is supplied during cooling tower operation to compensate for water losses due to______________________?
A. Evaporation
B. Blowdown
C. Entrainment
D. All A., B. & C.
