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Mass Transfer

Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

91.5
95
90
99

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Mass Transfer
Removal of __________ exemplifies an adsorption unit operation.

None of the listed here
Water from petrol
Ammonia from coke oven gas
Uranium from its ore

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Mass Transfer
Chemisorption (chemical adsorption) is

A reversible phenomenon
Characterised by adsorption of heat
An irreversible phenomenon
Same as "Van der Waals" adsorption

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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
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?

∞
1
< 1

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Mass Transfer
As complete saturation of an adsorbent is approached, the differential heat of adsrop-tion approaches

That of normal condensation
Integral heat of adsorption
Zero
None of these

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