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

Dilute
Hot water
Monoethanol amine (MEA)
Vetrocoke solution

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Mass Transfer
Flights in a rotary dryer are provided to

None of these
Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
Reduce the residence time of solid
Increase the residence time of the solid

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