Chemical Engineering MCQs

Page No. 637

Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the _______________ with the concentration of the solution?


aDegree of ideality


bViscosity


cBoth A & B


dNeither A nor B


View Answer Both A & B

At minimum reflux ratio for a given separation__________________?


aNumber of plates is zero


bNumber of plates is infinity


cMinimum number of the theoretical plates is required


dSeparation is most efficient



In the desorption of highly soluble gas from the liquid, the main resistance will be in the ______________ phase?


aGas


bLiquid


cBoth A. & B.


dNeither A. nor B.


View Answer Liquid

Which of the following is the most suitable for extraction in a system having very low density difference ?


aMixer-settler extractor


bCentrifugal extractor


cPulsed extractor


dPacked extraction tower


View Answer Centrifugal extractor

What is the reflux ratio at total reflux ?


aZero


bInfinity


cInfinity


dData insufficient


View Answer Infinity

In case of gases, the binary diffusivity is proportional to (where, P = pressure) ?


aP


b1/P


c1/√P


d√P


View Answer 1/P

Air at a particular humidity is heated in a furnace. The new dew point_____________________?


aDecreases


bIncreases


cDepends on the extent of heating


dRemain unchanged


View Answer Increases

Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent ______________________?


aA pure component


bA binary mixture


cA ternary mixture


dPartially miscible ternary system


View Answer A binary mixture

Which of the following unit operations makes use of Thiele-Geddes equation ?


aLiquid-liquid extraction


bSolid-liquid extraction


cMulti-component absorption with chemical reaction


dMulti-component distillation



The-relative volatility for separation of a non-ideal binary mixture by distillation should be ___________________?


a0


b1


c> 1


d< 1


View Answer > 1

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