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This quiz contains multiple-choice problems on absorption concepts for operating lines, gas absorption principle and absorption tower design.
The equilibrium characteristics of the solubility of a gas in liquid helps to determine the
Which of the following is not an example of ideal solution?
Solubility of a gas increases with increase in temperature.
Spray tower is a __ process.
Co-current
Countercurrent
Continuous
Batch
Find the rate of non-diffusing solute if the mole fraction of the gas phase is 0.65 and the diffusing rate is 70 moles/h.
2 4.5 moles/h
200 moles/h
18.18 moles/h
37.7 moles/h
Lower density materials are sent through the bottom, and higher density materials are sent through the top in an absorber. True or false?
True
False
If the operating line touches the equilibrium line, separation is possible in an absorber. True or false?
True
False
Which of the following is a false condition for the ideal absorbent choice?
Gas solubility should be high
Vapour pressure should be low
Viscosity should be high
Low freezing point
Which of the following equations indicate Hendry’s law?
Y = (p/P)
Y = (p*P)
p = (Y/P)
p = (Y*P)
For the absorber design, plotting with mole ratio helps to find the
Slope of operating line
Slope of equilibrium curve
Minimum number of trays
Maximum number of trays
Gas absorption is transferring solute components from liquid solvent to gas mixture. True or false?
True
False
According to Raoult’s law, the partial pressure for a pure component solution is equal to
Total pressure
Vapour pressure
Atmospheric pressure
Mole fraction of respective phase
Find the improper characteristic of the ideal solution out of the following.
The average intermolecular force of attraction and repulsion are unchanged on mixing
Volume varies linearly with compositions
No evolution of heat
The total partial pressure varies linearly with compositions
The minimum non-diffusing liquid flow rate is 20 moles/hr, and for an absorber, the non-diffusing gas flow rate is 30 moles/hr. As the actual liquid flow rate is 2.5 times the minimum, find the slope of the operating line.
4.25
3.75
2.67
1.67
What is the value of X if stripper = (1/X)?
Condenser
Reboiler
Absorber
Sprayer
