A. Selectivity
B. Relative volatility
C. Solubility
D. Density difference
Correct Answer: Relative volatility ✔
Last Updated: February 16, 2019
Related MCQs
- The critical moisture content in case of drying indicates the __________ rate period?
- The drying time between fixed moisture content within diffusion controlled ‘falling rate period’ is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid) ?
- The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture?
- The slope of 9-line is determined by the__________?
- Freundlich equation applies to the adsorption of solute from__________?
- A solid is being dried in the linear drying rate regime from moisture content Xo to XF. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture Xo. The drying time for M = (Ls/ARc) is (where, L = total mass of dry solid, A = total surface area for drying Rc = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))__________?
- The Hatta number is important in__________?
- For a binary mixture with low relative volatility__________?
- The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3) ?
- Rayleigh’s equation applies to __________ distillation?
- In extraction, as the temperature increases, the area of heterogeneity (area covered by binodal curve)__________?
- Blowdown in a cooling tower__________?
- Plate efficiency in a distillation column is reduced due to the __________ of liquid?
- The wet and ‘dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C?
- Pick out the wrong statement. Raoult’s law does not apply, when the__________?
- Pick out the wrong statement pertaining to the analogy between equations of heat and mass__________?
- Water entrained by circulating air in cooling towers is termed as__________?
- Alcohol is dehydrated using __________ distillation?
- Pick out the wrong statement ?
- Pick out the wrong statement pertaining to the cooling towers ?
- Pick out the wrong statement?
- Pick out the wrong statement ?
- Pick out the wrong statement?
- Pick out the wrong statement ?
- Pick out the wrong statement ?
- With increase in temperature, the mutual solubility of two liquids__________?
- The diffusivity D. in a binary gas mixture is related to the pressure (P) as__________?
- Mass transfer co-efficient is directly proportional to DAB according to the __________ theory?
- Dorr thickener is an equipment used for__________?
- Can the efficiency of a plate in the distillation tower be greater than 100% ?
- With the lowering of equilibrium pressure, at a given temperature, the amount of adsorbate on the adsorbent ?
- H2S present in naphtha reformed gas is removed by absorbing with__________?
- In liquid extraction, if the selectivity is unity, then__________?
- Drying of a wet solid under constant drying conditions means the exposure of the wet solid to the air of constant__________?
- Design calculation for multiple component distillation is done by__________?
- Laboratory determination of the diffusivity of vapor is done by __________ method?
- Paper industry employs __________ driers ?
- Use of packed towers for distillation is generally limited to the__________?
- __________ extractor is used for the concentration of radioactive nuclear waste?
- In case of unsaturated air__________?
- The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?
- Minimum reflux ratio in a distillation column results in__________?
- High pressure at the bottom of a distillation tower handling heat sensitive materials results in__________?
- In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be__________?
- Which of the following is directly concerned with Psychrometry ?
- Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ column?
- At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes__________?
- Ammonia present in the coke oven gas is removed by washing with__________?
- Most important factor to be considered in the selection of packings for absorbers is the __________ of packing?
- Which of the following provides maximum contact surface for a liquid-vapour system ?
- Experimental determination of __________ is done by wetted wall column method?