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Mass Transfer

Mass Transfer
In case of liquids, the binary diffusivity is proportional to (where, T = temperature)

T²
T
√T
1/T

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Mass Transfer
For contacting a highly soluble gas with a liquid

Both of the options given here
Bubble the gas through liquid
None of the listed here
Spray the liquid on gas stream

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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
Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the

Specific heat
Latent heat
Sensible heat
Humid heat

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Mass Transfer
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in

Greater degree of separation with a fixed number of trays
Increased reboiler load
Increased reflux ratio
None of these

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Mass Transfer
Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of

Mass diffusivity to momentum diffusivity
Thermal diffusivity to mass diffusivity
Momentum diffusivity to thermal diffusivity
None of these

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