Mass Transfer
In a packed bed absorption column, the channelling will be noted by the

Sharp drop in pressure drop
Increase in flow rate
None of these
Sharp rise in pressure drop

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Mass Transfer
In an operating distillation column, the

Highest temperature is encountered at the top of the column
Driving force for the vapor flow is the pressure drop, as the pressure decreases gradually from the bottom to the top of the column
Driving force for the liquid flow is its specific weight
Vapors and liquids are at their dew point and bubble point respectively

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