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Mass Transfer

Mass Transfer
Tea percolation employs

Liquid-liquid extraction
Absorption
Leaching
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?

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

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

Hot water
Vetrocoke solution
Monoethanol amine (MEA)
Dilute

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Mass Transfer
Unit operation involved in the prilling of urea is

Crystallisation
Drying
Both B and C
Evaporation

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Mass Transfer
For contacting a highly soluble gas with a liquid

Bubble the gas through liquid
Both of the options given here
Spray the liquid on gas stream
None of the listed here

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Mass Transfer
Which of the following mixtures does not form an azeotrope at atmosheric pressure?

Methyl alcohol-acetone
Butyl acetate-water
Water-alcohol
None of these

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