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Mass Transfer

Mass Transfer
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

-0.6
-1.5
0.6
1.5

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Mass Transfer
Which of the following binary systems is an example of a maximum boiling azeotrope?

Water-hydrochloric acid
Acetone-carbon disulphide
Water-ethyl alcohol
None of the listed here

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Mass Transfer
When the feed to a distillation column is a saturated liquid, slope of the feed line is

Zero
Infinity
Unity
None of these

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Mass Transfer
A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process?

Temperature of the solid
Humidity of inlet air
Relative humidity of outlet air
Flow rate of inlet air

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Mass Transfer
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams

Passes through a maximum
Decreases
Remains unaffected
Increases

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Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

1
8
9
10

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