A. tem separation

B. ponents is linear in the case of steady state equimolal counter-diffusion</strong>

C. Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas

D. The Hatta number is important in problems involving gas absorption without chemical

E. ction

A. A sharp increase in pressure drop gives an indication of the flooding in a distillation column

B. Separation of components is not possible in liquid extraction, if selectivity is unity

C. uum</strong>

E. Critical moisture content is not a property of the material itself

A. Higher wet bulb temperature

C. Higher absolute (specific) humidity

D. Higher dew point

A. Sieve-plate column

B. Randomly packed column

C. Bubble-cap column

B. Randomly packed column

C. Bubble cap column

D. Sieve plate column

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

B. reases

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

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

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

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

A. Temperature is less

B. dition</strong>

C. Total pressure is less

D. Saturated steam is used for steam distillation

B. Sensible heat changes are negligible compared with latent heat changes

C. Molar latent heats of all components are equal

D. Heat of mixing is negligible

A. Leaching

B. Liquid-liquid extraction

D. Absorption

A. Differential heat of adsorption

C. Heat of wetting

D. Heat of normal condensation

A. bottom to the top of the column</strong>

C. Driving force for the liquid flow is its specific weight

D. Vapors and liquids are at their dew point and bubble point respectively

E. Highest temperature is encountered at the top of the column

A. Liquid-solid

C. Solid-solid

D. Gas-solid

A. None of these

C. Hot water entering and the cooled water leaving the cooling tower

D. Hot water entering the tower and the wet bulb temperature of the surrounding air

A. Separation is most efficient

B. Minimum number of the theoretical plates is required

C. Number of plates is zero

A. Less than that computed for ideality

B. Less than the sum of the vapour pressure of the components

C. None of these

A. Remain unchanged

B. Depends on the extent of heating

D. Decreases

B. None of these

C. Slightly concave downward

D. Straight line

A. Across

B. Above

D. Neither A. nor B.

A. Centrifugal extractors

C. Agitated vessels

D. Packed towers

A. Absorption

C. Adsorption

D. Rectification

A. Drum drier

B. Tunnel drier

C. Spray drier

B. Data insufficient, cant be predicted

C. Decrease

D. Remain same

A. A ternary mixture

B. Partially miscible ternary system

D. A pure component

A. None of these

C. Heat gain or loss

D. Flow rate of gas

A. Recovery of vegetable oils from seeds

B. Separation of sugar from sugar beet by hot water

D. Dissolution of tannin out of tree barks by water

A. Vapor pressure

B. Viscosity

D. Freezing point

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

C. None of these

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

B. Neither the product composition nor the fraction vaporised

C. The product composition but not the fraction vaporised

D. The product composition as well as the fraction vaporised

A. Freeze drying is used for the drying of fish

B. brane is called dialysis

C. Reboiler is not used in open steam distillation

E. tillation column at normal operating reflux condition</strong>

F. The separation of solutes of different molecular sizes in a liquid solution by use of a suitable

A. Both liquids flow at fixed rate

B. Both liquids can have any desired flow rate

D. Liquids flow rate depends upon the temperature and pressure

A. Acetone-carbon disulphide

B. n-heptane-n-octane

C. Water-ethyl alcohol

B. 9.21

C. 100

D. 0.001

A. Solvent used in extractive distillation should be of high volatility

C. A sharp decrease in pressure drop is an indication of flooding in a distillation coloumn

D. tillation</strong>

E. Flash distillation is suitable for separating components which have very close boiling

F. ber of theoretical stages required for the separation of non-ideal binary system by

B. dimension of diffusivity is same as that of the

C. Molal concentration

D. Velocity head

E. Density

A. Condenser load

B. Reboiler load

C. All A., B. and C.

B. 0.01

C. 0.1

D. > 1

B. Sherwood number

C. Prandtl number

D. Schmidt number

B. Rapid absorption rates and good heat transfer characteristics

C. Low pressure drop on pumping

D. Improved flooding characteristics

A. Murphree efficiency < point efficiency

B. Murphree efficiency > point efficiency

C. Murphree efficiency ? point efficiency

A. Ponchan-Savarit method

C. Enthalpy concentration method

D. Plate absorption column

A. Spray

B. Wetted wall

C. Packed

B. M.T.C. of liquid in liquid-gas system

C. M.T.C. of individual components in a liquid-liquid system

D. The overall M.T.C. of the system

A. Crystal growth

C. Avoiding deposition on cooler surfaces

D. Formation of nuclei

A. Packed

B. Tray

C. Spray

A. None of these

C. Reduce the residence time of solid

D. Increase the residence time of the solid

A. Real solutions

B. Non-ideal gases

D. Mixture of water and alcohol

A. ther

B. Elutriation process refers to when the soluble material is largely concentrated on the surface of

D. insoluble solid and is simply washed off by the solvent

E. Cellulose acetate membranes are used in dialysis process

F. Cascade means a group of stages interconnected so that various streams flow from one to

A. Height of the distillation column

B. Optimum reflux ratio

D. Maximum number of ideal plates

A. Yes; but height of cooling tower will be prohibitively high

B. Yes; but the air flow rate should be excessively high

D. Yes

A. Low pressure drop

B. Low velocity of the liquid

C. High temperature