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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 5
11.
Molecular seives are regenerated by heating to __________ °C.
< 150
200-330
> 500
> 1000
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as
Ri = Re
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
In a counter-current extractor, as the axial mixing increases, the extraction efficiency
increases
decreases
remains unchanged
depends on the pressure of the system
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.
indirect tray
spray
freeze
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In extractive distillation, solvent is
added to alter the relative volatility of the mixture.
of high volatility.
present in overhead stream.
of high viscosity to give high tray efficiency.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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