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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 7
11.
Pick out the wrong statement.
In solvent extraction, the distribution co-efficient should be as large as possible for solvent economy.
With increase in pressure, the solubility of gases in solvent increases at a fixed temperature.
Decrease in Murphree plate efficiency is an indication of entrainment in distillation coloumn.
The capacity of a distillation coloumn is maximum at total reflux.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
The relative volatility of a binary mixture at the azeotropic composition is
1
> 1
0
∞
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Relative volatility varies with the concentration of component for an ideal solution. The relative volatity of a binary mixture may be defined as the ratio of vapor pressure of component 'A' to that of component 'B', when
only vapor phase follows Raoult's law.
only liquid phase obeys Dalton's law.
liquid phase obeys Dalton's law and vapor phase obeys Raoult's law.
Vapor phase obeys Dalton's law and liquid phase obeys Raoult's law.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.
less than
more than
equal to
either (o) or (b); depends on the solid
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Lewis number (Le) is
Sc / Pr
Pr x St
Sh x Pr
St x Sh
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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