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Mass Transfer

Mass Transfer
Rayleigh's equation applies to __________ distillation.

Differential
Continuous
Steam
Flash

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Mass Transfer
H₂S present in naphtha reformed gas is removed by absorbing with

K₂CO₃
HCl
Vacuum gas oil
Ethanolamine

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Mass Transfer
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

< 1 and ≈ 1
>1 and ≈ 1
0 and ≈ 1
1 and 0

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Mass Transfer
If f = moles of vapour present per mole of feed, then the slope of feed line is

- (f - 1)/f
(1 - f)/f
- f/(1 - f)
- 1/f

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Mass Transfer
_______ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower.

Lewis
Stanton
Peclet
Sherwood

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Mass Transfer
The main reason for dividing a tall packed tower into series of small towers is to

Reduce liquid hold up
Avoid channeling
Avoid flooding
Minimise the overall pressure drop

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