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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 13
31.
In extraction, as the temperature increases, the area of hetrogeneity (area covered by binodal curve)
decreases
increases
remains unchanged
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Pick out the wrong statement.
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are the same for NSc = NPr = 1.
1 Nm3 of dry air is lighter than 1Nm3 of humid air.
The Lewis number of a mixture is unity, when the thermal diffusivity is equal to the mass diffusivity.
An azeotropic mixture of two liquids has boiling point higher than either of them, when it shows negative deviation from Raoult's Law.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.
lower than
higher than
equal to
either (a) or (b), depends on the mixture composition
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
At constant pressure, with increase of temperature, the dew point will
increase
decrease
remain unchanged
increase/decrease ; depends on the temperature
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
For a single component absorber, the operating line is straight only when plotted in term of __________ units.
partial pressure
mole ratio
mole fraction
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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