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.

21.7
18.7
27.3
20

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Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Component molecules are nonpolar
Chemical combination or molecular association between unlike molecules takes place in the formation of solution
Attractive forces between like and unlike molecules in the solution are approximately equal
Size of component molecules are not equal

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Mass Transfer
In case of an absorber, the operating

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

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