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Mass Transfer

Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

More than
Twice
Half
Equal to

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Mass Transfer
HETP is numerically equal to HTU, only when the operating line

Lies above the equilibrium line
Lies below the equilibrium line
And equilibrium lines are parallel
Is far from the equilibrium line

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Mass Transfer
Raoult's law is applicable to the

Non-ideal gases
Real solutions
Ideal solutions
Mixture of water and alcohol

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Mass Transfer
The Hatta number is important in

Multicomponent distillation
Gas absorption without chemical reaction
Binary distillation
Gas absorption with chemical reaction

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Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

0.1
10-5 to 10-6
> 1
0.01

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Mass Transfer
Molecular diffusivity of a liquid

May increase or decrease with temperature
Decreases with temperature
Increases with temperature
Is independent of temperature

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