Related Questions

In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.
A Total
B Minimum
C Operating
D Maximum permissible
Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?
A Sensible heat changes for vapour & liquid are negligibly small
B Reflux is not a saturated liquid
C Molar latent heat of the two components are equal
D Heat of mixing of normal liquid is assumed to be zero
Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the
A Relative volatility is reasonably constant
B Mixture (to be separated) shows negative deviation from ideality
C Mixture (to be separated) shows positive deviation from ideality
D Multicomponent distillation is involved
Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation?
A Sorel-Lewis method
B McCabe-Thiele's method
C Ponchon-Savarit method
D None of these
In distillation column design, the McCabe-Thiele procedure is inadequate and a Ponchan-Savarit procedure is needed, when
A Saturated feed is not used
B An azeotrope forms
C The latent heat of vaporisation of the more and less volatile components are greatly different
D A total condenser is used
Which of the following is considered equivalent to one theoretical stage in Mc-Cabe Thiele's method?
A Partial condenser
B Total condenser
C Reboiler
D Both B and C
McCabe-Thiele method of binary distillation does not assume that the
A Sensible heat changes are negligible compared with latent heat changes
B Molar latent heats of all components are equal
C Heat of mixing is negligible
D None of these
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for
A Constant molal overflow
B Total reflux
C Constant relative volatility
D All of the above
The minimum number of theoretical plates is required for achieving a given separation in distillation column with
A No reflux
B Total reflux
C Zero reflux ratio
D Minimum reflux ratio
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?
A 0
B 1
C ∞

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