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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 1
11.
Pick out the correct statement.
In case of liquid-liquid extraction, no separation is possible, if the selectivity of the solvent used is unity.
With increase in temperature, the selectivity of the solvent used in solvent extraction decreases.
The selectivity of solvent used in solvent extraction is unity at the plait point.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
__________ columns are used for liquid dispersion in a continuous gas phase.
Packed
Pulse
Bubble cap
Sieve plate
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Overall efficiency of the distillation column is
the ratio of number of ideal plates to actual plates.
the ratio of number of actual plates to ideal plates.
same as the Murphree efficiency.
always more than the point efficiency.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
On addition of solute in the solvent, the __________ of the solution decreases.
boiling point
freezing point
vapour pressure
both (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Which is the controlling factor for a drum drier?
Diffusion
Heat transfer
Both (a) and (b)
Neither (a) nor (b)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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