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Mass Transfer

Mass Transfer
Berl saddle made of carbon cannot be used for

H₂SO₄
SO₂
Alkalis
Oxidising atmosphere

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Mass Transfer
In case of unsaturated air

None of the listed here
Both of the options given here
Dew point < wet bulb temperature
Wet bulb temperature < dry bulb temperature

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Mass Transfer
The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called

Percolation
Elutriation or elution
None of these
Decoction

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Mass Transfer
Which of the following is the most suitable for extraction in a system having very low density difference?

Mixer-settler extractor
Packed extraction tower
Pulsed extractor
Centrifugal extractor

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Mass Transfer
Critical humidity of a solid salt means the humidity

Below which it will always stay dry
Both A and B
Above Which it will always become dry and below which it will always stay damp
Above which it will always become damp

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

Twice
More than
Equal to
Half

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