Test: Mass Transfer - 6 - Chemical Engineering MCQ

The reciprocal of stripping factor is termed as

Ponchan-Savarit method analyses the fractional equipment based on

The binary diffusivity in gases at atmospheric conditions is about

Percentage saturation is __________ the relative saturation.

In case of a desorber (stripper), the

What is the reflux ratio at total reflux ?

Under conditions of flooding in packed tower, the gas pressure drop

For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

For absorbing a sparingly soluble gas in a liquid

The minimum number of theoretical plates is required for achieving a given separation in distillation column with

Channelling in a packed tower results from the

The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its

A good solvent used for absorption should not have very high

In a counter-current liquid extractor

Which of the following is an undesirable property for an absorbing solvent ?

 For a ternary mixture, the number of cuts required is_________

The wetted wall tower is used to determine

With increase in gas rate, the number of transfer units, N_toG, for a fixed degree of absorption by a fixed amount of solvent

Schmidt number is given by

Positive deviation from Raoult's law means a mixture whose total pressure is

The caking of crystals can be prevented by

Prandtl number for water at 20^oC is about