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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 9
6.
Removal of __________ exemplifies an adsorption unit operation.
uranium from its ore
water from petrol
ammonia from coke oven gas
mustard oil from mustard seed
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Can the efficiency of a plate in the distillation tower be greater than 100% ?
Yes
Normally not; but is possible if infinite number of plates are put.
Never
Yes ; if the reflux ratio is maximum.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.
increases
decreases
remains same
increases linearly
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
For gas absorption, low viscosity solvents are preferred, because of their
better flow characteristics.
low pumping pressure drop.
rapid absorption rates.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
To remove all the moisture from a wet solid it requires exposure to __________ air.
perfectly dry
highly humid
high temperature
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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