Mass Transfer
Chemisorption compared to physical absorption has

Lower capacity of the solvent for the solute gas
Increased utilisation of stagnant zones of the liquid phase
Lower adsorption rate
None of these

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Mass Transfer
A 25 cm x 25 cm x 1 cm flat sheet weighing 1.2 kg initially was dried from both sides under constant drying rate conditions. It took 1500 seconds for the weight of the sheet to reduce to 1.05 kg. Another 1m x 1m x 1cm flat sheet of the same material is to be dried from one side only.Under the same constant drying rate conditions, the time required for drying (in seconds) from its initial weight of 19.2 kg to 17.6 kg is

1000
1500
2500
2000

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Mass Transfer
In case of an absorber, the operating

Line always lies above the equilibrium curve
Line can be either above or below the equilibrium curve
Line always lies below the equilibrium curve
Velocity is more than the loading velocity

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