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Mass Transfer

Mass Transfer
Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as

K ∝ √D
K ∝ D
K ∝ D1.5
K ∝ D2

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Mass Transfer
Reboiler is considered as one theoretical plate, because

Reboiler itself contains one plate
None of these
Vapour is recycled to the column
Of the assumption that vapour and liquid leaving the reboiler are in equilibrium

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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
At a fixed total pressure, humidity depends only on the

Heat capacity of the vapour
Partial pressure of vapour in the mixture
Density of the vapour
None of these

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Mass Transfer
Which of the following is used for the concentration of rubber latex?

Agitated film evaporator
Calendria
Long tube vertical evaporator
Short tube evaporator

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Mass Transfer
Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in

Degree of ideality of the solution
Neither A nor B
Viscosity with concentration
Both A & B

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