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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 2
16.
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives
low pressure drop and high hold up.
high pressure drop and low hold up.
low pressure drop and low hold up.
high pressure drop and high hold up.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.
100
> 100
< 100
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m2 and the solvent flow, rate is 400 moles of S/m2. hr. The equilibrium data is represented by Y = 3X2 , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is
25%
50%
70%
90%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Raoult's law is applicable to the
ideal solutions
real solutions
mixture of water and alcohol
non-ideal gases
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Weeping in a distillation column
increases tray efficiency.
provides large interfacial surface for mass transfer.
results due to very high gas velocity.
results due to very low gas velocity.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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