Relative volatility ? for a binary system is a measure of separability by distillation. If ? = 1 the separation by distillation is
A.maximum possible
B.least possible
C.impossible
D.optimum possible
A.maximum possible
B.least possible
C.impossible
D.optimum possible
A.always less than the wet-bulb temperature of entering air
B.always equal to the wet-bulb temperature of entering air
C.always greater than the wet-bulb temperature of entering air
D.always equal to the dry-bulb temperature of entering air.
A.bubble point
B.dew point
C.wet-bulb temperature
D.dry-bulb temperature
A.the highest permissible temperature and pressure
B.the lowest practicable temperature and pressure
C.the highest permissible temperature and the lowest practicable pressure
D.the lowest temperature and the highest practicable pressure
A.the liquid/vapour loading in each section of the tower remains constant
B.Troutons rule is applicable
C.the sensible heat differences are small because the temperature change from tray to tray is small
D.all of the above
A.from 5 to 10?F
B.from 20 to 30?F
C.from 30 to 35?F
D.from 10 to 25?F
A.is saturated
B.shows negative deviation from Raoults law
C.shows positive deviation from Raoults law
D.shows no deviation from Raoults law
A.the driving for the vapour flow is the pressure drop
B.the driving force for the liquid flow is its weight
C.the liquids and vapours are always at their bubble point and dew point respectively
D.all of these answers
A.remains unaffected with change in temperature
B.increases with increase in temperature
C.decreases with increase in temperature
D.varies as the square root of temperature