Chemical Engineering MCQs

Page No. 552

The performance of a cascade of CSTR’s can be improved by adding__________________?


aA P.F. reactor in series


bA P.F. reactor in parallel


cMore CSTR’s in series


dMore CSTR’s in parallel



According to Arrhenius equation of temperature dependency of rate constant for an elementary reaction _________________?


ak ∝ √T


bk ∝ e-E/RT


ck ∝ T e-E/RT


dNone of these


View Answer k ∝ e-E/RT

When the reaction is dominated by intraparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as ________________?


anD = (n + 1)/2


bnD = n/2


cnD = n + 1


dNone of these


View Answer nD = (n + 1)/2

The equilibrium constant for the reversible reaction as shown in the bellow figure, is affected by the__________________?


aTemperature of the system


bPresence or absence of inerts


cPressure of the system


dKinetics of the reaction



. In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2__________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio of SO2 to air?


a(i) increases (ii) decreases


b(i) decreases (ii) increases


c(i) increases (ii) increases


d(i) decreases (ii) decreases



Consider the ‘n’ th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot ?


aCA0 Vs t1/2


bln CA0 Vs t1/2


cCA0 Vs ln t1/2


dln CA0 Vs ln t1/2


View Answer CA0 Vs ln t1/2

In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants) ?


aA


bN


cA + N


dA – N


View Answer A + N

A trickle bed reactor is the one, which_________________?


aHas altogether three streams either entering or leaving


bProcesses three reactants at different flow rates


cProcesses three reactants with same flow rate


dEmploys all the three phases (i.e. solid, liquid and gas)



The rate of reaction of a/an ______________ reaction is not affected by temperature rise ?


aAutocatalytic


bPhotochemical


cConsecutive


dZero order


View Answer Photochemical

The energy balance equation over a tubular reactor under transient conditions is________________?


aAn ordinary non-linear differential equation


bAn algebraic differential equation


cA linear partial differential equation


dA non-linear partial differential equation



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