Category: Mass Transfer

A. √T
B. T2
C. T
D. T4

A. The slope of the stripping line is always less than unity
B. For a given separation in a binary distillation column, with increase in reflux ratio (above the
minimum reflux ratio), the fixed cost of the distillation column first increases and then
decreases
C. In Ponchon-Savarit method of no. of theoretical plate determination, the stripping and
rectifying operating lines are vertical at total reflux
D. Kremser-Brown-Souder’s equation is used to calculate the efficiency of a plate tower

A. Selectivity
B. Relative volatility
C. Solubility
D. Density difference

A. Partial pressure of vapour in the mixture
B. Heat capacity of the vapour
C. Density of the vapour
D. None of these

A. Penetration
B. Surface renewal
C. Film
D. None of these

A. Optimum number of trays
B. Minimum reboiler size
C. Maximum condenser size
D. Minimum number of trays

A. Increased diffusivity
B. Decreased viscosity of liquid
C. Both A. and B.
D. Neither A. nor B.

A. Form minimum boiling azeotrope
B. Have very wide boiling points
C. Have very close boiling points
D. Form constant boiling azeotrope

A. Adsorption
B. Binary distillation
C. Gas absorption
D. Humidification

A. Different solids have different equilibrium moisture curves
B. Total condenser or reboiler is considered equivalent to one theoretical plate in McCabe-Thiele
method of theoretical plate calculation for distillation column
C. Heat removal load on cooler remains constant, even with increase of the reflux ratio in a
distillation column
D. Even a forced draft cooling tower cannot cool water below the wet bulb temperature