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Mass Transfer

Mass Transfer
Tea percolation employs

None of these
Leaching
Absorption
Liquid-liquid extraction

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Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

< 25
25
> 25
-25

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Mass Transfer
Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower.

Packed
Perforated tray
Wetted wall
Bubble cap

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Mass Transfer
Berl saddle made of carbon cannot be used for

Alkalis
SO₂
H₂SO₄
Oxidising atmosphere

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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
Freundlich equation applies to the adsorption of solute from

Dilute solutions, over a small concentration range
Concentrated solutions
None of these
Gaseous solutions at high pressure

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