A. Degree of dispersion of one fluid in the other

B. Interfacial surface exposed between the phases

C. Both A. & B.

A. LG/m

C. mL/G

D. G/mL

A. Unity

B. Zero

C. None of these

A. High pressure

B. Atmospheric

C. None of these

A. For a given separation in a binary distillation column, with increase in reflux ratio (above the

B. Kremser-Brown-Souders equation is used to calculate the efficiency of a plate tower

C. tifying operating lines are vertical at total reflux</strong>

D. The slope of the stripping line is always less than unity

E. imum reflux ratio), the fixed cost of the distillation column first increases and then

A. Increases with increase in

B. Is one at unity value of

D. Neither A. nor B.

A. 1

C. 0

A. Heat gain or loss

B. None of these

D. Flow rate of gas

B. Heat of wetting

C. Heat of normal condensation

D. Differential heat of adsorption

A. Increases

C. Remains same

D. Either A. or B., depends on the system

A. Liquid extraction

B. Fractional crystallisation

C. Evaporation

A. Liquid-liquid extraction

B. Solid-liquid extraction

D. Multi-component absorption with chemical reaction

B. Natural draft cooling tower

C. Induced draft cooling tower

D. None of these

B. Peclet number

C. Thermal diffusivity

D. Momentum diffusivity

B. The ratio of number of actual plates to ideal plates

C. Same as the Murphree efficiency

D. Always more than the point efficiency

A. None of these

B. Partial pressure of vapour

C. Relative humidity

A. Liquid density

C. Gas viscosity

D. Liquid hold up

B. Vapors are not always at their dew points

C. Highest temperatures is near the feed plate

D. All A., B. and C.

A. Furfural

B. Hexane

D. Benzol

A. Always < 1

C. None of these

D. G/L

A. Decreases with temperature rise

B. Increases with increase in pressure

D. Increases with temperature rise

A. The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are the same

B. ws negative deviation from Raoults Law

D. An Azeotropic mixture of two liquids has boiling point higher than either of them, when it

E. The Lewis number of a mixture is unity, when the thermal diffusivity is equal to the mass

F. fusivity

A. Lime water

C. Dilute H2SO4

D. Hexane

B. Packed

C. Wetted wall

D. Spray

A. Pressure

C. Temperature

D. Nature of the components

B. Number of plates is zero

C. Separation is most efficient

D. Minimum number of the theoretical plates is required

B. D ? T2

C. D ? T0.5

D. D ? T

A. Door classifier can be used for leaching of coarse solids

C. Very high temperature is not needed for the leaching of sugar beet

D. Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor

A. Molecular velocity only

B. Molecular mean free path only

D. Pore radius of the catalyst only

A. Provides poorer contact between the fluids

B. Gives lower pressure drop

D. Gives higher pressure drop

A. 1

B. 0

D. < 1

A. The product composition as well as the fraction vaporised

C. The product composition but not the fraction vaporised

D. Neither the product composition nor the fraction vaporised

B. Constant relative volatility

C. Constant molal overflow

D. Total reflux

A. orption tower, then the upper end of the operating line touches the equilibrium curve

B. With decrease in the liquid flow rate for a fixed gas flow rate, the slope of the operating line

C. io is also large in case of a counter current gas absorption tower

D. reases, in case of gas absorption process

E. The average distance between the operating line and equilibrium line is large, when the liquidgas

F. When the concentration difference for the mass transfer becomes zero at the bottom of the gas

A. Depends on relative volatility

B. Remains unchanged

C. Increases

A. Low velocity

B. Low vapour pressure

C. Low freezing point

B. Bollman extractor

C. Rotating-disc contactor

D. Mixer-settler extractor

A. Low viscosity

C. None of these

D. Small latent heat

A. Dialysis process is used for the production of fresh water from brine

C. Electrodialysis is used for the refining/purification of petrol

D. Both B. and C.

A. Ri = Re

C. Ri = (1 Re)/Re

D. Ri = Re/(1 Re)

A. Solubility of the components of air in water is very small

B. They are always equal under all circumstances

D. Lewis number is close to unity

A. Water-alcohol

B. Methyl alcohol-acetone

C. Butyl acetate-water

B. 5-Jan

C. 200-300

D. > 500

A. Degree of ideality

B. Viscosity

D. Neither A nor B

A. rpm

B. Inclination with ground surface

D. Neither A. nor B.

A. Either A. or B. would suffice

B. Spray the liquid on gas stream

C. None of these

A. Mixer-settler extractor

B. Packed extraction tower

D. strong>. Pulsed extractor

A. Tar from coke oven gas in primary gas coolers using chilled water

B. Ammonia from coke oven gas using refrigerated water

D. Benzol from coke oven gas using solar oil/wash oil

A. Decreases

B. Remains unchanged

D. Decreases linearly

B. [xD/(RD + 1)], [RD/(RD + 1)]

C. [xD/(RD + 1)], [(RD + 1)/RD]

D. None of these