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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 9
11.
The operating cost of a distillation column at minimum reflux ratio is
minimum
maximum
infinite
zero
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
The reflux to a distillation column is 100 moles/hr, when the overhead product rate is 50 moles/hr. The reflux ratio is
2
0.5
50
150
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Molecular diffusivity of a liquid
increases with temperature.
decreases with temperature.
may increase or decrease with temperature.
is independent of temperature.
Answer: Option
Explanation:
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14.
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.
25
> 25
< 25
- 25
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Henry's law states that the
partial pressure of a component over a solution is proportional to its mole fraction in the liquid.
partial pressure of a component over a solution is proportional to the mole fraction in the vapour.
vapour pressure is equal to the product of the mole fraction and total pressure.
partial pressure is equal to the product of the mole fraction and total pressure.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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