A catalyst in a chemical reaction:
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 10
Design of heterogeous catalytic reactor involves consideration of __________ steps
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Considering the endotheomic dissociation of CaCO3 in a closed vessel (CaCO3
CaO + CO2), the pressure of CO2 increases, if:
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Half life period of a first order irreversible reaction A
B is:
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 11
The catalyst in a first order chemical reaction changes the:
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When the reaction is dominated by in-traparticle diffusion, the apparent order of reaction (nD) as measured is related to the true order (n) as:
A.
B.
C.
nD = n + 1
D.
None of these
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The space time is equivalent to the holding time in a steady state mixed reactor for:
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 2
For a tubular flow reactor with uniform concentration and temperature, the independent variable is:
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The performance equations for constant density systems are identical for:
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In case of a consecutive unimolecular type first order reaction
, the concentration of component __________ increases continuously with time
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 3
For the irreversible elementary first order reaction in parallel viz.
, a plot of Cy Vs. Cz will give a straight line having a slope of:
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For the reaction
, the rate of formation of Z is 0.2 gm mole/litre.hr. What is the rate of disappearance of X in gm mole/litre. hr ?
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The rate of forward reaction, at chemical equilibrium is____the rate of backward reaction:
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 4
The rate of a homogeneous reaction is a function of:
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An irreversible first order reaction is being carried out in a CSTR and PFR of same volume. The liquid flow rates are same. The relative conversion will:
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Calcination reaction of limestone (CaCO3
CaO + CO2) goes to completion in the rotary kiln, because:
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 5
For a fluidised bed reactor, the most suitable/relevant model is a __________ model
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When a catalyst increases the rate of chemical reaction, the rate constant:
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What is the unit of the rate constant in a chemical reaction in which 10% of the reactant decomposes in one hour, 20% in two hours, 30% in three hours and so on ?
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 6
Volume change for unimolecular type first order reaction
, increases __________ with time
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The exit age distribution of fluid leaving a vessel is used to know the:
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According to Arhenious equation of temperature dependency of rate constant for an elementary reaction:
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 7
Slurry reactors are characterised by the:
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An irreversible aqueous phase reaction, A + B
P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m3 of each A and B enters the reactor at 8m3 /hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed ?Data: Heat of reaction = - 50 kJ/mole
Density of the reacting mixture = 1000kg/m3
Specific heat of reacting mixture = 2kJ/kg.K
The above data can be assumed to be independent of temperature and composition:
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The vessel dispersion number (D/?L) for plug flow is:
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 8
Molecularity of a reaction:
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Half life period of decomposition of a liquid 'A' by irreversible first order reaction is 12 minutes. The time required for 75% conversion of 'A' is __________ minutes
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From Arhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is:
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Chemical Reaction Engineering MCQ Practice Questions (Chem) Set 9
Chemical kinetics can predict the __________ of a chemical reaction:
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In case of calcination of limestone, CaCO3 CaO + CO2, the addition of more of CaO will result in __________ in the concentration of CO2
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An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature
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During manufacture of H2SO4, the oxidation of SO2 to SO3 by oxygen is an en-dothermic reaction. The yield of SO3 will be maximised, if the:
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Pick out the wrong statement:
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An elementary liquid phase decomposition reaction
is to be carried out in a CSTR. The design equation is:A.
k? = XA/(1 - XA)
B.
k? = XA(1 + XA)/(1 + XA)
C.
k? = XA/(1 - XA)2
D.
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Pick out the wrong statement:
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The point selectivity of the product 'Y' in the reaction,
is equal to:
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An isothermal aqueous phase reversible reaction, P
R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP - 0.125CR. A stream containing only P enters the reactorThe residence time required (in hours) for 40% conversion of P is:
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Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug flow reactor ?
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Promoter is added to the catalyst to improve its:
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The first order gas phase reaction
is conducted isothermally in batch mode. The rate of change of conversion with time is given by:A.
B.
C.
D.
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In case of a P.F.R., there:
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The dispersion number of perfect mixed flow is:
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For the non-catalytic reaction of particles with surrounding fluid, the time needed to achieve the same fractional conversion for particles of different but unchanging sizes is proportional to the square of particle diameter, when the __________ is the controlling resistance
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An isothermal irreversible reaction is being carried out in an ideal tubular flow reactor. The conversion in this case will __________ with decrease in space time
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A consecutive reaction,
, is characterised by:
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