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Mass Transfer

Mass Transfer
Leaching of coarse solid lumps is also termed as

Decoction
Dissolution
Percolation
Agitation and settling

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Mass Transfer
At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent.

100
Between 0 and 100
50

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Mass Transfer
According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)

1/D
D
D2
D0.5

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Mass Transfer
In a binary system, separation is very efficient, when the relative volatility is

> 1
0.5
1
< 1

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Mass Transfer
Mass transfer co-efficient of liquid is

Affected much less by temperature than that for gases
Not affected by the temperature
None of these
Affected more by temperature than that for gases

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Mass Transfer
Which of the following decreases during evaporative cooling process with recirculated water supply?

Relative humidity
Wet bulb temperature
Partial pressure of vapour
None of these

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