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Mass Transfer

Mass Transfer
Tea percolation employs

Leaching
Liquid-liquid extraction
Absorption
None of these

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Mass Transfer
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature)

T vs . P
P vs . log T
Log P vs . T
Log P vs. log T

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

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

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Mass Transfer
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?

< 1
∞
1

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Mass Transfer
High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Very efficient operation
Thermal decomposition of bottoms
Erosion of the tower
Increased relative volatility

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Mass Transfer
Reboiler is considered as one theoretical plate, because

Vapour is recycled to the column
None of these
Of the assumption that vapour and liquid leaving the reboiler are in equilibrium
Reboiler itself contains one plate

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