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Mass Transfer

Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

90
91.5
99
95

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Mass Transfer
Which of the following quantities need not be fixed before starting the design of a co-current absorber?

None of the listed here
Heat gain or loss
Flow rate of gas
Flow rate of entering liquid

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Mass Transfer
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.

Either same or higher than
Lower than
Same as
Higher than

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Mass Transfer
Raoult's law is applicable to the

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

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Mass Transfer
In batch distillation with constant reflux, overhead product composition __________ with time.

Does not vary
Decreases
May increase on decrease, depends on the system
Increases

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Mass Transfer
Agitator is provided in a crystalliser for

All of these
Formation of nuclei
Avoiding deposition on cooler surfaces
Crystal growth

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