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Mass Transfer

Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

1/f
F/2
2f
F

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Mass Transfer
Only small amount of evaporation of water produces large cooling effects because of its

Large latent heat
Low viscosity
Small latent heat
None of these

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Mass Transfer
Very tall packed towers are divided into series of beds to

Avoid flooding
Avoid channelling
Reduce liquid hold-up
Reduce the overall pressure drop

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Mass Transfer
To remove all the moisture from a wet solid it requires exposure to __________ air.

High temperature
Perfectly dry
None of these
Highly humid

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Mass Transfer
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature)

P vs . log T
Log P vs . T
T vs . P
Log P vs. log T

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Mass Transfer
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

Viscosity
Both A & B
Degree of ideality
Neither A nor B

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