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Mass Transfer

Mass Transfer
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

-1.5
-0.6
1.5
0.6

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Mass Transfer
Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture.

Unbound
Critical
Bound
Free

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Mass Transfer
For a binary mixture with low relative volatility, continuous rectification to get pure products will require

High reflux ratio
Small cross-section column
Less number of trays
Low reflux ratio

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Mass Transfer
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.

Lower than
Either A or B, depends on the mixture composition
Equal to
Higher than

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Mass Transfer
Tower diameter may be decreased by

Increasing the liquid flow rate
Use of increased tray spacing
Increasing the vapour flow rate
Using higher reflux ratio

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Mass Transfer
Raschig ring made of procelain cannot be used for treating concentrated

Nitric acid
Alkalis
Sulphuric acid
Hydrochloric acid

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