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Mass Transfer

Mass Transfer
The binary diffusivity in gases and liquids vary respectively as

T3/2 and √T
T and T3/2
T3/2 and T
√T and T3/2

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Mass Transfer
In case of gases, the binary diffusivity is proportional to (where, P = pressure)

1/P
√P
1/√P
P

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Mass Transfer
In rectifying section of a continuous distillation column, the

Liquid is stripped of high boilers
Vapour is enriched with high boilers
Vapour is enriched with low boilers
None of these

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Mass Transfer
The value of NA/(NA + NB), for steady state equimolal counter diffusion of two gases 'A' and 'B' is

0.5
1
∞
2

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Mass Transfer
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a

Higher relative humidity
Higher absolute (specific) humidity
Higher dew point
Higher wet bulb temperature

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

Tray
Spouted bed
Truck
Rotary

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