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Mass Transfer

Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

1.2 to 1.5
3 to 4
2.5 to 3
5

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Mass Transfer
Gaseous diffusivity at atmospheric pressure is of the order of __________ cm²/second.

> 10
1
5 to 10
1 to 5

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Mass Transfer
Raoult's law is applicable to the

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

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Mass Transfer
The binary diffusivity in gases and liquids vary respectively as

T3/2 and T
T and T3/2
T3/2 and √T
√T and T3/2

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

> 1
0.1
0.01
10-5 to 10-6

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Mass Transfer
Which of these columns incurs the lowest pressure drop?

Bubble plate column
Packed column (with dumped packing)
Packed column (with stacked packing)
Pulse column

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