Chemical Engineering - Mass Transfer

36.
Molarity is defined as the number of gm moles of solute per __________ of solvent.
litre
kg
gm
c.c
Answer: Option
Explanation:
No answer description is available. Let's discuss.

37.
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around
1
0.24
3.97
600
Answer: Option
Explanation:
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38.
Which of the following T-H diagram is valid for dehumidification operation ?
Answer: Option
Explanation:
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39.
An aqueous solution of methanol is to be distilled in a tray column. High pressure steam is available as a source of heat. For a given reflux ratio and overhead composition, two options are being explored; (i) a reboiler is used and (ii) no reboiler is used but steam is fed directly to the bottom of the column. As compared to option (i), in option (ii)
less number of trays are required.
composition of the residue remains unchanged.
more number of trays are required but the residue composition remains unchanged.
more number of trays are required and the residue composition is more dilute in methanol.
Answer: Option
Explanation:
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40.
The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an __________ law.
exponential
parabolic
linear
cubic
Answer: Option
Explanation:
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