Mass Transfer
Stage efficiency in a leaching process depends on the

Time of contact between the solid and the solution
Rate of diffusion of the solute through the solid and into the liquid
Both A & B
Vapour pressure of the solution

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Cooling and dehumidification
Heating and dehumidification at almost constant wet bulb temperature
Dehumidification with dry bulb temperature remaining constant
None of these

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Steam distillation is not recommended to be used, if the

Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature
Liquids decompose, if distilled directly at atmospheric pressure
Azeotropic mixture is to be separated and the final product is miscible with water
Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Plate efficiency

Is a function of the mass transfer between liquid and vapour
Increases due to liquid entrainment
Increases due to foaming
Increases due to weeping and dumping of liquid

ANSWER DOWNLOAD EXAMIANS APP