For obtaining a given separation in distillation column the minimum number of theoretical stages is obtained with
A.minimum reflux ratio
B.optimum reflux ratio
C.total reflux
D.zero reflux ratio
A.minimum reflux ratio
B.optimum reflux ratio
C.total reflux
D.zero reflux ratio
A.varies inversely as the gas viscosity
B.is proportional to the gas viscosity
C.varies as the square root of gas viscosity
D.varies as the square of the gas viscosity
A.alters the relative volatility of the original components
B.is of low volatility
C.must form no azeotrope with the original substances
D.all of these answers
A.NPr/NSc
B.NPr NSc
C.NSc/NPr
D.Cs (NSc/NPr)
A.Solubility
B.Relative volatility
C.Density difference
D.Selectivity
A.is the maximum ratio which will require an infinite number of trays for the separation desired
B.corresponds to the maximum reboiler heat load for the separation desired
C.corresponds to the maximum condenser colling load for the separation desired
D.is always zero
A.directly as the pressure
B.inversely as the pressure
C.inversely as the square root of pressure
D.directly as the square root of pressure
A.both temperature and pressure must be fixed
B.either the temperature or the pressure may be fixed
C.the temperature is always more than 100?C at 1 atm
D.the temperature is always equal to 100?C at 1 atm