Q. In liquid extraction, if the selectivity is unity, then

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Q. Paper industry employs __________ driers.

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Q. Which of the following has the same dimension as mass diffusivity ?

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Q. Pick out the wrong statement pertaining to the cooling towers.

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Q. Perforated plate towers are unique for solvent extraction because, they provide

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Q. In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of __________ is zero.

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Q. Pick out the wrong statement pertaining to the analogy between equations of heat and mass transfer operations.

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Q. The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

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Q. The individual mass transfer co-efficients (moles/m² . s) 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 ?

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Q. Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ coloumn.

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Q. With the lowering of equiliDrium pressure, at a given temperature, the amount of ad-sorbate on the adsorbent

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Q. Mass transfer co-efficient is defined as

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Q. When an unsaturated air-water mixture is heated at constant pressure, then

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Q. During sensible cooling process

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Q. Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10⁻³ kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

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Q. Leaching of coarse solid lumps is also termed as

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Q. The main reason for dividing a tall packed tower into series of small towers is to

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Q. Co-current absorbers are usually used when the gas to be dissolved in the liquid is

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Q. At what percentage (by volume) of alcohol composition, it forms an azeotrope with water ?

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Q. The overall mass transfer co-efficient for the absorption of SO₂ in air with dilute NaOH solution can be increased substantially by

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