Chemical Engineering MCQs

Page No. 568

For a tubular flow reactor with uniform concentration and temperature, the independent variable is___________________?


aTime

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bLength

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cDiameter

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dNone of these

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View Answer Length

In chamber process of sulphuric acid manufacture in industry, the gas phase oxidation of SO2 to SO3 is accomplished by a ______________ reaction ?


aNon-catalytic homogeneous

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bNon-catalytic heterogeneous

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cCatalytic homogenous

✓


dCatalytic heterogeneous

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View Answer Catalytic homogenous

The catalyst in a first order chemical reaction changes the_________________?


aEquilibrium constant

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bActivation energy

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cHeat of formation of the product

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dHeat of reaction

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View Answer Activation energy

For a tubular reactor with space time ‘η’ and residence time ‘ζ’, the following statement holds good ?


aη and θ are always equal

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bη = θ, when the fluid density changes in the reactor

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cη = θ, for an isothermic tubular reactor in which the density of the process fluid is constant

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dη = θ, for a non-isothermal reactor

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Kinetics of a solid catalysed reaction can best be studied in a _________________ reactor?


aBatch

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bPlug-flow

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cMixed

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dNone of these

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View Answer Mixed

If ‘n’ is the order of reaction, then unit of rate constant is _________________?


a1/(time)(concentration)n – 1

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b(Time)-1 (concentration)n – 1

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c(Time)n – 1 (concentration)

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dNone of these

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A rise in temperature ______________________?


aNormally tends to increase the reaction rate

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bDoes not affect a catalysed reaction

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cDoes not affect photo-chemical reaction rates

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dAll A., B. and C.

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View Answer All A., B. and C.

BET apparatus is used to determine the ___________________?


aSpecific surface of a porous catalyst

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bPore size distribution

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cPore diameter

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dPorosity of the catalyst bed

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Effectiveness factor of a catalyst pellet is a measure of the _________________ resistance?


aPore diffusion

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bGas film

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cChemical reaction

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dNone of these

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View Answer Pore diffusion

In the fluid catalytic cracker (FCC), the cracking reaction is _____________ (i) and the regeneration is _______________ (ii) _______________?


a(i) exothermic (ii) endothermic

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b(i) exothermic (ii) exothermic

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c(i) endothermic (ii) endothermic

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d(i) endothermic (ii) exothermic

✓



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