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

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

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Mass Transfer
Humid volume is the total volume in m³ of 1 kg of

Vapour laden gas at 1 atm. and room temperature
Gas plus its accompanying vapour at 1 atm. and room temperature
Gas plus its accompanying vapour at 1 atm. and gas temperature
Vapour laden gas at 1 atm. and gas temperature

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