Which of the following is a suitable absorbent for removal of H₂S from natural gas ?

In a gas-liquid absorption coloumn, for obtaining the maximum absorption efficiency

Unsaturated air (with dry and wet bulb temperatures beingand 25°C respectively) is passed through water spray chamber maintained at 35°C. The air will be

Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (y_in = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (y_in/y_out).Forrecovery of acetone, the number of trays required is/are

Reverse osmosis is also called

Which of the following is not a batch drier?

For absorbing a sparingly soluble gas in a liquid, the

A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

Schimdt number and Lewis number for pure air at atmospheric conditions are respectively

Extraction of coffee from its seed is done by

If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are

Which of the following assumes constant molal vaporisation and overflow ?

Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is

Steam distillation is not recommended to be used, if the

The boiling points of pure components of a binary system __________ with increase in total pressure of the system.

Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

In azeotropic mixture, the equilibrium vapour composition is

Which of the following operations does not involve leaching ?

Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be

Selectivity of the solvent used in solvent extraction should be

'ADDUCTS' and 'CLATHRATES' are used in case of

Adsorption is an unit operation which generally involves __________ systems.

Pick out the wrong statement. Raoult's law does not apply, when the

Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.

Can a cooling tower cool water below the wet bulb temperature of inlet air ?

Dry bulb temperature of the gas is __________ the wet bulb temperature.

Rayleigh equation applies to __________ distillation.

The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the

Flooding in a column results due to

Molecular diffusion is caused by the

N_Sc/N_Pr is called the

With lapse of time, the overhead composition of light component in case of batch distillation with constant reflux

Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of

The recovery of pencillin from the acidified fermentation broth is done by

Pick out the wrong statement pertaining to leaching.

In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.

Water-ethyl alcohal solution can be concentrated (in respect of alcohal concentration) by __________ distillation.

A binary mixture of benzene and cyclohexane is separated by

Component A is diffusing in a medium B. The flux N_A relative to a stationary point is equal to the flux due to molecular difusion, if

The solvent used in liquid-liquid extraction should have __________ less than one.

Decoction refers to the use of solvent

Which of the following gas-liquid contacting devices incurs the least pressure drop for a particular duty ?

A liquid mixture containso-xylene,p-xylene and 10%. m-xylene (all percentages in w/w). Which of the following statements would be true in respect of this mixture?

McCabe-Thiele method