Q. Adsorption is an unit operation which generally involves __________ systems.

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Q. In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.

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Q. Separation of the isotopes of helium for scientific investigations is done by

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Q. Extraction of coffee from its seed is done by

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Q. In azeotropic mixture, the equilibrium vapour composition is

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Q. With lapse of time, the overhead composition of light component in case of batch distillation with constant reflux

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Q. Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of

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Q. According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)

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Q. Which of the following assumes constant molal vaporisation and overflow ?

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Q. Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be

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Q. Selectivity of the solvent used in solvent extraction should be

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Q. Pick out the wrong statement pertaining to leaching.

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Q. Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

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Q. Can a cooling tower cool water below the wet bulb temperature of inlet air ?

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Q. The solvent used in liquid-liquid extraction should have __________ less than one.

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Q. The suitable evaporator for concentration of foaming liquids is a __________ evaporator.

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Q. The ratio of Murphree plate efficiency to point efficiency is always > 1 in a __________ flow model.

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Q. Tea percolation employs

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Q. Flooding in a column results due to

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Q. Which of the following gas-liquid contacting devices incurs the least pressure drop for a particular duty ?

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