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Mass Transfer

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

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

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Mass Transfer
For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will

Remain same
Data insufficient, can't be predicted
Decrease
Increase

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Mass Transfer
If the amount of the steam used in steam distillation is increased, the temperature of distillation

Decreases
Depends on relative volatility
Remains unchanged
Increases

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Mass Transfer
If a₁ and a₂ are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.

None of these
a₁ = 0.5 a₂
a₁ = a₂
a₁ = 2a₂

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Mass Transfer
In case of liquids, the binary diffusivity is proportional to (where, T = temperature)

T²
T
1/T
√T

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Mass Transfer
The most efficient cooling tower out of the following is

Forced draft
Natural draft
Atmospheric
Induced draft

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