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.Management Sciences
Category: Mass Transfer
A binary mixture of benzene and cyclohexane is separated by___________________?
A. Flash vaporisation
B. Extractive distillation
C. Solvent extraction
D. Ordinary distillation
___________________ extractor uses centrifugal force for separating the two phases?
A. Treybal
B. Scheibel
C. Podbielniak
D. None of these
Unsaturated air (with dry and wet bulb temperatures being 35 and 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be__________________?
A. Cooled
B. Humidified
C. Both A. & B.
D. Dehumidified
During constant rate drying period, vaporisation rate per unit drying surface area _____________________?
A. Decreases with time
B. Increases with time
C. Does not change with time
D. Does not affect the moisture content of the wet solid
Which of the following binary systems is an example of a maximum boiling azeotrope ?
A. Water-hydrochloric acid
B. Acetone-carbon disulphide
C. Water-ethyl alcohol
D. n-heptane-n-octane
‘Absorption with chemical reaction’ is involved in the removal of__________________?
A. Carbon dioxide from gaseous stream using alkaline solution
B. Benzol from coke oven gas using solar oil/wash oil
C. Ammonia from coke oven gas using refrigerated water
D. Tar from coke oven gas in primary gas coolers using chilled water
Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a ________________ column?
A. Spray
B. Packed
C. Bubble cap plate
D. Wetted wall
Positive deviation from Raoult’s law means a mixture whose total pressure is___________________?
A. Greater than that computed for ideality
B. Less than that computed for ideality
C. Less than the sum of the vapour pressure of the components
D. None of these
Which of the following equipments is not used in liquid-liquid extraction ?
A. Pachuka tank
B. Agitated vessels
C. Centrifugal extractors
D. Packed towers
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