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Mass Transfer

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

K ∝ D1.5
K ∝ √D
K ∝ D
K ∝ D2

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

0.01
> 1
0.1
10-5 to 10-6

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Mass Transfer
During sensible cooling process

Both B and C
Wet bulb temperature decreases
Relative humidity increases
Relative humidity decreases

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Mass Transfer
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is

Insoluble in the liquid
Soluble in the liquid
At a fixed temperature
Non-ideal in nature

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Mass Transfer
Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?

Dew point
Dry bulb temperature
None of these
Wet bulb temperature

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Mass Transfer
In distillation column design, the McCabe-Thiele procedure is inadequate and a Ponchan-Savarit procedure is needed, when

Saturated feed is not used
A total condenser is used
The latent heat of vaporisation of the more and less volatile components are greatly different
An azeotrope forms

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