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

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bA P.F. reactor in parallel

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cMore CSTR’s in series

✓


dMore CSTR’s in parallel

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


ak ∝ √T

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bk ∝ e-E/RT

✓


ck ∝ T e-E/RT

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dNone of these

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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

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cnD = n + 1

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dNone of these

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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

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bPresence or absence of inerts

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cPressure of the system

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dKinetics of the reaction

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. 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

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b(i) decreases (ii) increases

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c(i) increases (ii) increases

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d(i) decreases (ii) decreases

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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

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bln CA0 Vs t1/2

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cCA0 Vs ln t1/2

✓


dln CA0 Vs ln t1/2

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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

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bN

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cA + N

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dA – N

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View Answer A + N

A trickle bed reactor is the one, which_________________?


aHas altogether three streams either entering or leaving

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bProcesses three reactants at different flow rates

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cProcesses three reactants with same flow rate

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

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


aAutocatalytic

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bPhotochemical

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cConsecutive

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dZero order

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View Answer Photochemical

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


aAn ordinary non-linear differential equation

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bAn algebraic differential equation

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cA linear partial differential equation

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dA non-linear partial differential equation

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