A. Multi-component distillation
B. Binary distillation
C. Gas absorption without chemical reaction
D. Gas absorption with chemical reaction
Correct Answer: Gas absorption with chemical reaction ✔
Last Updated: February 15, 2019
Related MCQs
- Freundlich equation applies to the adsorption of solute from__________?
- The slope of 9-line is determined by the__________?
- 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)__________?
- Plate efficiency in a distillation column is reduced due to the __________ of liquid?
- In extraction, as the temperature increases, the area of heterogeneity (area covered by binodal curve)__________?
- 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 ?
- Raoult’s law does not apply, when the__________?
- In most of the mechanically agitated liquid-liquid extractors, baffles or horizontal compartmental plates are provided, which helps in__________?
- Rayleigh’s equation applies to __________ distillation?
- Blowdown in a cooling tower__________?
- pertaining to the analogy between equations of heat and mass transfer operations ?
- Water entrained by circulating air in cooling towers is termed as__________?
- Alcohol is dehydrated using __________ distillation?
- When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation?
- Mechanism of moisture removal in case of freeze drying of food stuff is by __________?
- Molality is defined as the number of gm moles of solute per __________ of solvent ?
- Flash distillation is __________?
- When an unsaturated air-water mixture is heated at constant pressure, then __________ ?
- Danckwerts developed the __________ theory?
- Leaching of coarse solid lumps is also termed as __________?
- Steam distillation is used to__________?
- Which of the following can be calculated theoretically using steam table and Dalton’s law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known ?
- In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL) as __________ ?
- Rayleigh equation applies to __________ distillation ?
- What is the degree of freedom of an absorption process in which only one component is transferred between phases ?
- Polar organic compounds are normally used as separating agents for the azeotropic and extractive distillation. Which of the following is the most important factor to be considered for the choice of the separating agent for extractive distillation ?
- At 750°K and 1 atm, the approximate value of Schmidt number for air is__________?
- For water-ethanol system, the minimum reflux ratio__________?
- Penetration theory relates the average mass transfer co-efficient (K) with diffusivity D. as__________?
- Which one of the following devices is not used for both the absorption as well as the liquidliquid extraction processes ?
- Relative volatility varies with the concentration of component for an ideal solution. The relative volatility of a binary mixture may be defined as the ratio of vapor pressure of component ‘A’ to that of component ‘B’, when__________?
- Calculation of mass transfer co-efficient is mostly/normally done using __________ theory?
- With increase in temperature, the leaching rate increases because of the __________?
- For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be __________?
- Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture ?
- The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the__________?
- Swenson-Walker crystalliser is a __________ unit ?
- A 25 cm × 25 cm × 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m × 1m × 1cm flat sheet of the same material is to be dried from one side only. Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is __________?
- Henry’s law states that the __________?
- Desulphurisation of petrol is done in a __________?
- Pressure drop through plate tower as compared to that through packed tower, for the same duty will be__________?
- For gas absorption, low viscosity solvents are preferred, because of their __________?
- Which of the following increases during evaporative cooling process with recirculated water supply ?
- Drying of a solid involves __________ transfer ?
- In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of __________ is zero?
- Which of the following is used for the concentration of rubber latex ?
- Operating velocity in a packed tower is usually __________ the flooding velocity ?
- For stripping of a gas in a counter current stripper, the operating line __________?
- In gas-liquid contact operation, the number of ideal stages, N = (xa – xb)/(xb – x*b). This is true when the stripping factor ‘S’ is __________?
- The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same system is__________?