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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 8
26.
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as
D ∝ T
D ∝ T0.5
D ∝ T1.5
D ∝ T2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
For which of the following unit operations, Lewis number is of significance ?
Adsorption
Binary distillation
Gas absorption
Humidification
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Tray spacing in a distillation column of dia 10-12 ft. used in petroleum refinery may be around __________ inches.
5
30
60
100
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
If a1 and a2 are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.
a1 = a2
a1 = 2a2
a1 = 0.5 a2
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The dimension of diffusivity is same as that of the
density
molal concentration
kinematic viscosity
velocity head
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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