Q. With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

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Q. For gas absorption, low viscosity solvents are preferred, because of their

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Q. To remove all the moisture from a wet solid it requires exposure to __________ air.

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Q. 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 ?

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Q. As the reflux ratio increases, the slope of the operating line for rectifying section

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Q. Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature)

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Q. The unit of volumetric diffusivity is

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Q. For a ternery mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a __________ of the equilateral triangular co-ordinates.

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Q. Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature.

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Q. 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 sytem is

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Q. The slope of 9-line is determined by the

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Q. In steam distillation, the

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Q. 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 ?

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Q. Which of the following parameters remains constant during chemical dehumidifica-tion?

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Q. Drying of a solid involves __________ transfer.

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Q. Mechanism of moisture removal in case of freeze drying of food stuff is by

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Q. The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.

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Q. Which is not concerned directly with mass transfer ?

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Q. In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the __________ number.

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Q. Which one of the following devices is not used for both the absorption as well as the liquid-liquid extraction processes ?

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