Hello students welcome to msbte news in this article we have provided 22512 Chemical Reaction Engineering Mcq Questions and Answer. This chemical reaction engineering multiple choice questions is ideal for Students who are in Third Year of Diploma in Chemical Engineering courses. By referring chemical reaction engineering mcq pdf for Diploma you will get to know about the paper pattern of Msbte Mcq Winter 2021 exams.

with this Mcq on Chemical Reaction Engineering 3rd year students can practice for their upcoming Winter 2021 exams. In this chemical reaction engineering objective questions we have selected 30 important questions from previous year papers. you can also download Chemical Reaction Engineering Pdf below we have given a download link.

Chemical Reaction Engineering Mcq Questions and Answer

01. In case of staged packed bed reactors carrying out exothermic reaction, use
(A) High recycle for pure gas
(B) Plug flow for dilute liquid requiring no large preheating of feed
(C) Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature
(D) All (A), (B) and (C)

Correct!

Wrong!

02. The performance equations for constant density systems are identical for
(A) P.F.R. and backmix reactor
(B) P.F.R. and batch reactor
(C) P.F.R, batch reactor and backmix reactor
(D) Batch reactor and backmix reactor

Correct!

Wrong!

03. The equilibrium constant of chemical reaction __________ in the presence of catalyst.
(A) Increases
(B) Decreases
(C) Remain unaffected
(D) Can either increase or decrease (depends on the type of catalyst)

Correct!

Wrong!


  1. Study of chemical kinetics is the easiest in the case of __________ reactions. 

(A) Irreversible
(B) Reversible
(C) Surface
(D) Side

Correct!

Wrong!

05. With increase in temperature, the equilibrium conversion of a reversible exothermic reaction
(A) Decreases
(B) Increases
(C) Remain unaffected
(D) Decreases linearly with temperature

Correct!

Wrong!

06. Pick out the wrong statement.
(A) Visible radiation provides the necessary activation energy in photochemical reactions
(B) The order and molecularity of a complex reaction may not be the same
(C) For a second order reaction, the slope of the graph/plot between rate and (concentration) is equal to the rate constant (k)
(D) Molecularity of the reaction is always a whole number greater than zero

Correct!

Wrong!

07. In a first order reaction, the time required to reduce the concentration of reactant from 1 mole/litre to 0.5 mole/litre will be __________ that required to reduce it from 10 moles/litre to 5 moles/litre in the same volume.
(A) More than
(B) Less than
(C) Same as
(D) Data insufficient; can’t be predicted

Correct!

Wrong!

08. 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
(A) Be more in CSTR than in PFR
(B) Be more in PFR than in CSTR
(C) Be same in both cases
(D) Depend on the temperature

Correct!

Wrong!


  1. A stirred tank reactor compared to tubular-flow reactor provides 

(A) More uniform operating conditions
(B) Permits operation at the optimum temperature for a long reaction time
(C) Higher overall selectivity for a first order consecutive reaction
(D) All (A), (B) and (C)

Correct!

Wrong!

10. A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are
(A) Equal in size
(B) Of different sizes
(C) Of such size that the ratio of their volumes is < 5
(D) None of these

Correct!

Wrong!

11. Half life period of a first order irreversible reaction A → B is
(A) k/
(B) ln k/2
(C) ln 2/k
(D) ln 0.5/k

Correct!

Wrong!

12. An example of autothermal reactor operation is
(A) Sulphur dioxide oxidation
(B) Ethylene oxidation
(C) Benzene oxidation
(D) Ammonia synthesis

Correct!

Wrong!

13. The value of Steric factor ‘P’ in the equation k = PZeE/RT usually ranges from
(A) 1.0 to 10-8
(B) 1.1 to 102
(C) 0.1 to 0.9
(D) None of these

Correct!

Wrong!


  1. Brunauer, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation? 

(A) Langmuir’s assumption applies to every adsorbed layer
(B) There is no dynamic equilibrium between successive layer
(C) The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer (except the first one) is involved in each of the evaporation process
(D) None of these

Correct!

Wrong!

15. In case of the irreversible unimolecular type, first order reaction, the fractional conversion at any time for constant volume system as compared to variable volume system is
(A) More
(B) Less
(C) Same
(D) Either (A) or (B), depends on other factors

Correct!

Wrong!

16. For the same residence time, which one will give the maximum conversion?
(A) Single stirred tank (v = 5 litres)
(B) Two stirred tank (each of 2.5 litres) in series
(C) Stirred tank followed by tubular flow reactor (each of 2.5 litres)
(D) Single tubular flow reactor (v = 5 litres)

Correct!

Wrong!

17. In a zero order reaction, reactants concentration does not change with time and the
(A) Time for half change is half the time taken for completion of the reaction
(B) Time for half change is independent of the initial concentration
(C) Time for completion of the reaction is independent of the initial concentration
(D) Reaction rate is trebled when the initial concentration is trebled

Correct!

Wrong!

18. The conversion for a first order liquid phase reaction. A → B in a CSTR is 50%. If another CSTR of the same volume is connected in series, then the % conversion at the exit of the second reactor will be
(A) 60
(B) 75
(C) 90
(D) 100

Correct!

Wrong!

19. Variables affecting the rate of homogeneous reactions are
(A) Pressure and temperature only
(B) Temperature and composition only
(C) Pressure and composition only
(D) Pressure, temperature and composition

Correct!

Wrong!

20. For a __________ order reaction, the units of rate constant and rate of reaction are the same.
(A) Zero
(B) First
(C) Second
(D) Fractional

Correct!

Wrong!

21. The order of the reaction as shown in the below figure, is
(A) 0
(B) 1
(C) 2
(D) 3

Correct!

Wrong!

22. A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction.
(A) Less than
(B) Equal to
(C) More than
(D) Equal to or more than

Correct!

Wrong!

23. If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is the __________ diffusion.
(A) Film
(B) Ash layer
(C) Pore
(D) None of these

Correct!

Wrong!

24. Space velocity
(A) Describes the extensive operating characteristics of a tubular flow reactor
(B) Is the maximum feed rate per unit volume of reactor for a given conversion
(C) Is a measure of the ease of the reaction
(D) All (A), (B) and (C)

Correct!

Wrong!

25. The heat of reaction
(A) Depends on the pressure only
(B) Depends on the mechanism of reaction only
(C) Depends on both pressure and mechanism of reaction
(D) Is independent of the mechanism of reaction

Correct!

Wrong!

26. Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of the catalyst)/(rate if not snowed by pore diffusion), Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)
(A) tan hT/T
(B) tan T/T
(C) tan hT/tan T
(D) None of these

Correct!

Wrong!

27. B.E.T. method can be used to determine the __________ of a porous catalyst.
(A) Solid density
(B) Pore volume
(C) Surface area
(D) All (A), (B) and (C)

Correct!

Wrong!

28. The exit age distribution of a fluid leaving a vessel (denoted by E) is used to study the extent of non-ideal flow in the vessel. The value of ∫∞0 E.dt is
(A) 0
(B) 1
(C) ∞
(D) √2π

Correct!

Wrong!

29. On application of pressure to the equilibrium system, ice ⇌ water; which of the following phenomenon will occur?
(A) Water will evaporate
(B) Equilibrium will not be attained
(C) More ice will be formed
(D) More water will be formed

Correct!

Wrong!

30. Molecularity of an elementary reaction, P + Q → R + S is
(A) 1
(B) 2
(C) 3
(D) 4

Correct!

Wrong!

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22512 chemical reaction engineering mcq pdf

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