Mass Transfer
Which of the following remains constant during sensible cooling process ?

Partial pressure of vapour
None of the listed here
Specific humidity
Specific humidity & Partial pressure of vapour

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Mass Transfer
As the reflux ratio in a distillation coloumn is increased from the minimum, the

Number of plates decreases very slowly first and then more and more rapidly
Liquid flow increases while the vapor flow decreases for a system
Total cost first decreases and then increases
Slope of the operating line in stripping section decreases

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