Process Equipment and Plant Design
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids
The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty
In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes
Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution

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Process Equipment and Plant Design
Overall tray efficiency of a distillation column is the ratio of the number of

None of these
Ideal trays required to the number of real trays required
Real trays required to the number of ideal trays required
Overall gas transfer units to the number of ideal trays required

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