Chemical Engineering MCQs

Page No. 568

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


aTime


bLength


cDiameter


dNone of these


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


bNon-catalytic heterogeneous


cCatalytic homogenous


dCatalytic heterogeneous


View Answer Catalytic homogenous

The catalyst in a first order chemical reaction changes the_________________?


aEquilibrium constant


bActivation energy


cHeat of formation of the product


dHeat of reaction


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


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


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


dη = θ, for a non-isothermal reactor



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


aBatch


bPlug-flow


cMixed


dNone of these


View Answer Mixed

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


a1/(time)(concentration)n – 1


b(Time)-1 (concentration)n – 1


c(Time)n – 1 (concentration)


dNone of these



A rise in temperature ______________________?


aNormally tends to increase the reaction rate


bDoes not affect a catalysed reaction


cDoes not affect photo-chemical reaction rates


dAll A., B. and C.


View Answer All A., B. and C.

BET apparatus is used to determine the ___________________?


aSpecific surface of a porous catalyst


bPore size distribution


cPore diameter


dPorosity of the catalyst bed



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


aPore diffusion


bGas film


cChemical reaction


dNone of these


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


b(i) exothermic (ii) exothermic


c(i) endothermic (ii) endothermic


d(i) endothermic (ii) exothermic



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