Q. 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

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Q. Use of packed towers for distillation is generally limited to the

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Q. Pick out the wrong statement.

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Q. Which of the following decreases during evaporative cooling process with recirculated water supply ?

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Q. Laboratory determination of the diffusivity of vapor is done by __________ method.

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Q. The minimum liquid rate to be used in an absorber corresponds to an operating line

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Q. For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams

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Q. According to Chilton-Colburn analogy for mass transfer, (NSt.NSc)^2/3 is equal to

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Q. A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is

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Q. Minimum reflux ratio in a distillation column results in

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Q. Flooding in a distillation column is detected by a sharp

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Q. In case of unsaturated air

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Q. For a binary mixture with low relative volatility,

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Q. Plate efficiency

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Q. Absorption accompanied by heat evolution results in

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Q. Even though bubble cap towers are very effective for humidification operation, they are not used commonly in industries, because of the

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Q. Mass transfer co-efficient 'K' according to penetration theory varies with mass dif-fusivity as

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Q. Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.

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Q. __________ is the separation technique used for desalination of sea water.

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Q. The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture.

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