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Mass Transfer

Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

> 1
1
< 1

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Mass Transfer
Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

None of these
100
50
78

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Mass Transfer
Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.

Molecular
Simple
Extractive
Steam

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Mass Transfer
Which of the following is a suitable absorbent for removal of H₂S from natural gas?

Vetrocoke solution
Dilute
Hot water
Monoethanol amine (MEA)

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Mass Transfer
Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

Humidified at constant wet bulb temperature
Dehumidified
None of these
Humidified with wet bulb temperature decreasing

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Mass Transfer
Ammonia present in the coke oven gas is removed by washing with

Ethanolamine
Dilute HCl
Caustic solution
Dilute ammoniacal liquor

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