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Mass Transfer

Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

1.25 to 2.0
0.5 to 0.8
2.5 to 3.5
0.8 to 1.2

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Mass Transfer
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

< 6:1
> 8:1
> 4 :1
< 8 : 1

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

More than
Twice
Equal to
Half

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Mass Transfer
Which of the following solutions will follow Raoult's law most closely?

A solution of polar organic compounds (not of homologs of a series)
35% solution of camphor in water
A solution of benzene, toluene and oxylene
35% solution of NH₃ in water

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Mass Transfer
With increase in temperature, the leaching rate increases because of the

Both Decreased viscosity of liquid & Increased diffusivity
Decreased viscosity of liquid
Increased diffusivity
None of the listed here

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Mass Transfer
Extraction of pencillin employs a __________ extraction coloumn.

Centrifugal
Packed
Plate
None of these

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