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Mass Transfer

Mass Transfer
Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.

Vacuum
Rotary
Tunnel
Tray

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Mass Transfer
Reverse osmosis is also called

Ultrafiltration
Electrodilysis
Diffusion
Dialysis

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Mass Transfer
Gaseous diffusivity at atmospheric pressure is of the order of __________ cm²/second.

5 to 10
1 to 5
1
> 10

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Mass Transfer
With increase in pressure, the relative volatility for a binary system

Decreases
Either A or B, depends on the system
Increases
Remains same

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Mass Transfer
The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same sytem is

1
5
10
100

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Mass Transfer
For a fixed number of ideal stages in a distillation column, as the reflux ratio is increased, the difference in composition between the top and bottom product streams

Passes through a maximum
Remains unaffected
Decreases
Increases

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