A. 1
B. > 1
C. < 1
D. 0
Correct Answer: 1 ✔
Last Updated: February 17, 2019
Related MCQs
- Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure. Nitrobenzene will distil off __________ °C?
- Molecular sieves are porous__________?
- In liquid-liquid extraction, the number of phases at plait point is __________?
- JD factor for mass transfer is a function of Reynolds number. Mass transfer by molecular diffusion from a single drop to surrounding still air is given by__________?
- If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are__________?
- Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid) ?
- Wetted wall tower experiment determines the__________?
- Can a cooling tower cool water below the wet bulb temperature of inlet air ?
- The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm2/sec?
- In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads? Reflux conditions: (i) Reflux stream is completely liquid and is at its bubble point. (ii) Reflux stream is below its bubble point ?
- __________ column is used in gas absorption process ?
- The diffusion co-efficient in m2/s. of acetic acid in benzene (liquid in liquid) is__________?
- The ‘shanks system’ of leaching (i.e., counter-current multiple contact leaching) is used for__________?
- Which of the following employs an accessory known as ‘drift eliminator’ ?
- The term “approach” in a cooling tower refers to the difference in the temperature of the__________?
- Below is given an equilibrium moisture curve of a substance. State which regions represent free moisture and unbound moisture respectively ?
- Humid volume, at a given temperature is a/an __________ function of humidity?
- Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer?
- Which of the following is an undesirable characteristic for the solvent used in gas absorption ?
- For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will__________?
- A liquid mixture contains 30% o-xylene, 60% p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture ?
- In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of__________?
- Which of the following assumes constant molal vaporisation and overflow ?
- Which of the following binary systems is an example of a maximum boiling azeotrope ?
- Channelling is most severe__________?
- Extraction of coffee from its seed is done by__________?
- When the liquid phase and vapour phase of a binary system obeys Raoult’s and Dalton’s law respectively, the relative volatility is the ratio of__________?
- Flooding in a column results due to__________?
- Raoult’s law is applicable to the__________?
- Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer?
- Pick out the system with minimum boiling azeotrope at 1 atm ?
- The film penetration model of mass transfer was enunciated by__________?
- (NRe . NSc) is termed in mass transfer operation as the __________ number?
- In McCabe-Thiele method, at infinite reflux ratio__________?
- With lapse of time, the overhead composition of light component in case of batch distillation with constant reflux__________?
- The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called__________?
- The recovery of penicillin from the acidified fermentation broth is done by__________?
- Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be__________?
- Molarity is defined as the number of gm moles of solute per __________ of solvent?
- Adsorption is a unit operation which generally involves __________ systems?
- Agitator is provided in a crystalliser for__________?
- Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of__________?
- Corresponding to Nusselt number in heat transfer, the dimensionless group in mass transfer is the __________ number?
- Cox chart is useful in the design of__________?
- The binary diffusivity in gases and liquids vary respectively as__________?
- Decoction refers to the use of solvent__________?
- Ordinary diffusion process is also called __________ diffusion?
- Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower?
- The solvent used in liquid-liquid extraction should have __________ less than one?
- Which of the following equipments is not used for liquid dispersion ?
- Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the__________?