Chemical Engineering MCQs

Page No. 546

When the density of the reaction mixture is constant in a chemical reaction, the ratio of the mean residence time to space time is__________________?


a> 1

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b< 1

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c1

✓


d0

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View Answer 1

A reaction in which one of the products of reaction acts as a catalyst is called a/an ______________ reaction?


aCatalytic

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bAutocatalytic

✓


cPhotochemical

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dNone of these

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View Answer Autocatalytic

Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature ?


aTime

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bUseful volume of the tank

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cDiameter of the reactor

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dNone of these

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View Answer Time

When all the limiting reactant is consumed in the reaction, the operational yield _______________ the relative yield?


aIs greater than

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bIs smaller than

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cEquals

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dCan be either greater or smaller than (depends on the type of reaction)

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View Answer Equals

In flow reactors, the performance equations interrelate the rate of reaction to the___________________?


aFeed rate

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bReactor volume

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cExtent of reaction

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dAll A., B. and C.

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View Answer All A., B. and C.

In an ideal tubular-flow reactor_________________?


aThere is no mixing in longitudinal direction

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bMixing takes place in radial direction

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cThere is a uniform velocity across the radius

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dAll A., B. and C.

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View Answer All A., B. and C.

In a/an ______________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation?


aAdiabatic

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bIsothermal

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cNon-adiabatic

✓


dNone of these

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View Answer Non-adiabatic

When a catalyst increases the rate of forward reaction, the value of rate constant__________________?


aIncreases

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bDecreases

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cRemain same

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dBecomes infinite

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View Answer Increases

For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a _________________ reactor?


aStirred tank

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bTubular flow

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cBatch

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dFixed bed

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View Answer Stirred tank

A high space velocity means that a given__________________?


aReaction can be accomplished with small reactor

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bConversion can be obtained with a high feed rate

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cBoth A. and B.

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dNone of these

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View Answer Both A. and B.

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