Chemical Engineering MCQs

Page No. 543

For high conversion in a highly exothermic solid catalysed reaction, use a ______________ bed reactor?


aFixed


bFluidised bed reactor followed by a fixed


cFixed bed reactor followed by a fluidised


dFluidised



Sometimes, batch process is preferred over continuous process, when the product___________________?


aQuality & yield cannot be achieved in continuous processes, because of long residence time


bSales demand is fluctuating


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length ?


aDecreases


bIncreases


cIs at the highest allowable temperature throughout


dFirst increases and then decreases



A batch reactor is_______________?


aSuitable for gas-phase reactions on commercial scale


bSuitable for liquid phase reactions involving small production rate


cLeast expensive to operate for a given rate


dMost suitable for very large production rate



Radioactive decay follows ______________ order kinetics?


aFirst


bSecond


cThird


dZero


View Answer First

The single parameter model proposed for describing non-ideal flow is the ____________ model?


aTank in series


bDispersion


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Photochemical reaction rate does not depend significantly on temperature, because____________________?


aIt is a reversible reaction


bIt is an exothermic reaction


cThe energy of reacting molecules exceeds the activation energy by absorption of light


dNone of these



A batch reactor is suitable for__________________?


aAchieving cent percent conversion of reactants into products


bLarge scale gaseous phase reactions


cLiquid phase reactions


dObtaining uniform polymerisation products in highly exothermic reactions



A backmix reactor_________________?


aIs same as plug-flow reactor


bIs same as ideal stirred tank reactor


cEmploys mixing in axial direction only


dIs most suitable for gas phase reaction



For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the ______________ adsorption?


aPhysical


bChemical


cBoth A. and B.


dNeither A. nor B.


View Answer Chemical

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