Mass Transfer
A mixture of 10% C₆H₆ vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C.

20
18.7
21.7
27.3

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Mass Transfer
In case of an absorber, the operating

Line can be either above or below the equilibrium curve
Line always lies below the equilibrium curve
Velocity is more than the loading velocity
Line always lies above the equilibrium curve

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