Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

10
9
8
1

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Mass Transfer
In saturated gas, the

Vapour is in equilibrium with the liquid at the room temperature
None of the listed here
Partial pressure of vapour equals the vapour pressure of the liquid at room temperature
Vapour is in equilibrium with the liquid at the gas temperature

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Mass Transfer
If a two phase system is in physical equilibrium; then it means that, the

All of these
Total pressure throughout the liquid phase is equal to that throughout the vapor phase
Temperature of the liquid phase is equal to that of the vapor phase
Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase

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