Chemical Engineering MCQs

Page No. 543

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


aFixed

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bFluidised bed reactor followed by a fixed

✓


cFixed bed reactor followed by a fluidised

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dFluidised

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


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

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bSales demand is fluctuating

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cBoth A. & B.

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dNeither A. nor B.

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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

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bIncreases

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cIs at the highest allowable temperature throughout

✓


dFirst increases and then decreases

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A batch reactor is_______________?


aSuitable for gas-phase reactions on commercial scale

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bSuitable for liquid phase reactions involving small production rate

✓


cLeast expensive to operate for a given rate

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dMost suitable for very large production rate

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Radioactive decay follows ______________ order kinetics?


aFirst

✓


bSecond

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cThird

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dZero

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View Answer First

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


aTank in series

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bDispersion

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cBoth A. & B.

✓


dNeither A. nor B.

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View Answer Both A. & B.

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


aIt is a reversible reaction

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bIt is an exothermic reaction

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

✓


dNone of these

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A batch reactor is suitable for__________________?


aAchieving cent percent conversion of reactants into products

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bLarge scale gaseous phase reactions

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cLiquid phase reactions

✓


dObtaining uniform polymerisation products in highly exothermic reactions

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A backmix reactor_________________?


aIs same as plug-flow reactor

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bIs same as ideal stirred tank reactor

✓


cEmploys mixing in axial direction only

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dIs most suitable for gas phase reaction

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


aPhysical

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bChemical

✓


cBoth A. and B.

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dNeither A. nor B.

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View Answer Chemical

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