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Mass Transfer

Mass Transfer
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

2.5
0.0025
0.25
1.25

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Mass Transfer
In paper industry, paper is dried in a __________ dryer.

Festoon
Conveyor
Heated cylinder
Tunnel

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Mass Transfer
The-relative volatility for separation of a non-ideal binary mixture by distillation should be

> 1
< 1
1

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Mass Transfer
Large scale drying of wheat is done in a __________ dryer.

Fluidised bed
Spouted bed
Vacuum rotary
Tray

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Mass Transfer
For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

22190
43835
> 500
200-300

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Mass Transfer
If the amount of the steam used in steam distillation is increased, the temperature of distillation

Depends on relative volatility
Decreases
Remains unchanged
Increases

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