Distillation is spearation process of
(a) liquid-gas
(b) liquid-liquid
(c) solid-liquid
(d) None of these
Value of relative volatility should be
(a) more than one
(b) less than one
(c) zero
(d) None of these
The unit of volumetric diffusivity is
(a) cm sq./sec
(b) cm/sec
(c) cubic cm/sec
(d) cm sq/sec sq.
The driving force for mass transfer is
(a) concentration difference
(b) concentration gradient
(c) temperature gradient
(d) Both (a) and (b)
Distillation coloumn works at
(a) optimum reflux ratio
(b) minimum reflux ratio
(c) maximum reflux ratio
(d) None of these
Adsorption is a process
(a) Combustion
(b) Separation
(c) Size reduction
(d) None of these
Adsorbents in adsorption process are
(a) highly porous
(b) non porous
(c) both (a) & (b)
(d) None of the above
In Mccabe thiele method at maximum reflux ratio
(a) number of plates are maximum
(b) overhead product is maximum
(c) both operating line coincide with the diagonal
(d) None of these
The precentage humidity is less than relative humidity only at
(a) zero percent humidity
(b) hundred percent humidity
(c) both (a) & (b)
(d) None of these
Steam distillation is used to separate
(a) azeotropes
(b) high boiling substances from non-volatile impurities
(c) heat sensitive materials
(d) None of these
As the reflux ratio decreases
(a) separation becomes more efficient
(b) number of plates decreases
(c) column diameter increases
(d) None of these
Relative volatility does not change appreciably with change in
(a) Temperature
(b) Vapour pressure
(c) Total pressure
(d) None of these
Which of the following parameters remain constant during de-humidification
(a) dry bulb temperature
(b) partial pressure of vapour
(c) wet bulb temperature
(d) None of these
Raoult’s law applies to
(a) All liquid solutions
(b) only non ideal solution
(c) non volatile solute
(d) The solvents
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