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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 12
36.
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.
at < 100
at > 210.6
between 100 and 210
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Pick out the wrong statement.
With decrease in feed temperature, the number of plates required for binary distillation decreases for a given L/V ratio.
The extraction per unit of total height for a short packed column is more effective than for a tall column, in case of liquid-liquid extraction.
Natural draft cooling towers are made of ferro-concrete and its cross-section is wider at the bottom.
Vanderwall adsorption is also called chemisorption.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum ?
0
1
∞
< 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Batch tray dryers suffers from the disadvantage of
high maintenance cost.
non-uniform & low production rate.
high labour cost & low heat economy.
all 'a', 'b' & 'c'.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter
> 4 :1
< 8 : 1
> 8:1
< 6:1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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