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Mass Transfer

Mass Transfer
If f = moles of vapour present per mole of feed, then the slope of feed line is

- 1/f
- (f - 1)/f
- f/(1 - f)
(1 - f)/f

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Mass Transfer
Which of the following solutions will follow Raoult's law most closely?

35% solution of NH₃ in water
A solution of polar organic compounds (not of homologs of a series)
35% solution of camphor in water
A solution of benzene, toluene and oxylene

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Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Unbound
Equilibrium
Bound
Critical

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Mass Transfer
During dehumidification of unsaturated air wet bulb temperature & partial pressure of vapor are not constant. However, during evaporative cooling process with recirculated water supply, the __________ remains constant.

Relative humidity
None of these
Partial pressure of water vapor
Wet bulb temperature

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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 = a₂
a₁ = 2a₂
a₁ = 0.5 a₂

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Mass Transfer
Use of packed towers for distillation is generally limited to the

Vacuum distillation
Multicomponent distillation
Small sizes
High pressure operation

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