Q. In the absorption of ammonia in water, the main resistance to absorption is by the __________ phase.

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Q. Drying of refractory is normally carried out in a __________ dryer.

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Q. Heat sensitive materials with very high latent heat of vaporisation may be economically separated using

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Q. When the solvent dissolves very little of solute, then

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Q. The 'shanks system' of leaching (i.e., counter-current multiple contact leaching) is used for

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Q. Penetration model (theory) for mass transfer was enunciated by

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Q. Surface renewal model of mass transfer was enunciated by

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Q. When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

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Q. For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

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Q. The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the

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Q. Unit of molal diffusivity is

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Q. The term "approach" in a cooling tower refers to the difference in the temperature of the

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Q. Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

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Q. Equilibrium-moisture curves of different solids

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Q. Azeotropism for ethyl alcohol-water system disappears by

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Q. Degree of freedom for leaching and solvent extraction process is

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Q. 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

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Q. Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture ?

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Q. Which of the following is a suitable absorbent for removal of H₂S from natural gas ?

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Q. Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

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