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Mass Transfer

Mass Transfer
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

2.5
1.25
0.0025
0.25

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Mass Transfer
Which of the following equipments is not used for gas dispersion?

Spray towers
Bubble cap tray towers
Perforated sieve tray towers
Agitated vessels

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Mass Transfer
Smoke is an example of

Gas dispersed in liquid
Liquid dispersed in gas
Solid dispersed in liquid
Solid dispersed in gas

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Mass Transfer
In triangular co-ordinates, the ternery composition point falls __________ of the triangle.

In the corners
On the sides
None of these
Inside

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Mass Transfer
Which of the following is an undesirable property in a tower packing?

Large free cross-section
Large weight of liquid retained
Low weight per unit volume
Large surface per unit volume

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Mass Transfer
Relative volatility does not change appreciably with the change in

Temperature
Total pressure
Vapour pressure of either component
None of these

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