High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Diameter to height ratio for a rashig ring is

Which of the following is not a continuous leaching equipment ?

Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and

At a fixed pressure, the humidity depends upon the partial pressure of vapor in the mixture. Humidity of a vapour free gas is __________ percent.

Stage efficiency in a leaching process depends on the

Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10^-3 kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.respectively is

Measurement of the interfacial area of mass transfer is achieved easily & accurately in case of a __________ coloumn.

Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in

In physical terms, Schmidt number means

In case of liquids, the binary diffusivity is proportional to (where, T = temperature)

Pick out the wrong statement.

Pick out the wrong statement.

Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.

In extractive distillation, solvent is

The percentage humidity is less than the relative humidity only at __________ percent humidity.

__________ equation applies to diffusivities in liquids.

Alcohol is dehydrated using __________ distillation.

Separation of two volatile liquids by distillation makes use of their

The equipment used in the extraction of highly corrosive radio active liquids is

__________ extractor is used for the concentration of radioactive nuclear waste.

Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the __________ moisture.

Humid volume, at a given temperature is a/an __________ function of humidity.

Pore size of the molecular seiveis __________ mm.

Separation of __________ employs gaseous diffusion process.

In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is

Operating velocity in a packed tower is usually __________ the flooding velocity.

Leaching of coarse solid lumps is also termed as

The main reason for dividing a tall packed tower into series of small towers is to

With the lowering of equiliDrium pressure, at a given temperature, the amount of ad-sorbate on the adsorbent

Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate.

In a distillation column, with increase in the reflux ratio, the heat removed in the cooler

Pick out the wrong statement.

The diffusivity, D_AB (for component A diffusing in B) is equal to the diffusivity D_BA (for component B diffusing in A) for a binary mixture of

In case of non-ideal gases and liquids, the molal diffusivity

Back-trapping in a distillation column

Perforated plate towers are unique for solvent extraction because, they provide

In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the __________ number.

Removal of __________ exemplifies an adsorption unit operation.

Which of the following increases during evaporative cooling process with recirculated water supply ?

Dried finished product sampled from various parts of a __________ dryer exhibits non-uniformity in the moisture content.

According to Poiseuille's law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)

Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the __________ temperature.

Advantage of continuous drying over batch drying is that the

Ammonia present in the coke oven gas is removed by washing with

All moisture in a non-hygroscopic material is the __________ moisture.

The Schmidt number which is defined as, μ/ρ D, is the ratio of the

Swenson-Walker crystalliser is a __________ unit

For water-ethanol system, the minimum reflux ratio

Pick out the wrong statement: