Chemical Reaction Engineering MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Chemical Reaction Engineering, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Chemical Reaction Engineering MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Chemical Reaction Engineering mcq questions that explore various aspects of Chemical Reaction Engineering problems. Each MCQ is crafted to challenge your understanding of Chemical Reaction Engineering principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Chemical Reaction Engineering MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Chemical Reaction Engineering. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Chemical Reaction Engineering knowledge to the test? Let's get started with our carefully curated MCQs!

Chemical Reaction Engineering MCQs | Page 24 of 50

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Q231.
The reaction A β†’ B is conducted in an adiabatic plug flow reactor (PFR). Pure A at a concentration of 2 kmol/m³ is fed to the reactor at the rate of 0.01 m³ /s and at a temperature of 500 K. If the exit conversion is 20%, then the exit temperature (in k) is

(Data: Heat of reaction at 298 K = - 50000 kJ/ kmole of A reacted Heat capacities CPA = CPB = 100 kJ/kmole. K (may be assumed to be independent of temperature))

a.

400

b.

500

c.

600

d.

1000

Discuss
Answer: (c).600
Q232.
Which of the following is not a theory of homogeneous reaction?

a.

Collision theory and activated complex theory

b.

Chain reaction theory

c.

Radiation hypothesis

d.

None of these

Discuss
Answer: (d).None of these
Q233.
In a semi-batch reactor,

a.

mixing takes place in axial direction only.

b.

velocity of reaction can be controlled.

c.

condition similar to plug flow reactor exists.

d.

residence time is constant.

Discuss
Answer: (b).velocity of reaction can be controlled.
Q234.
Most important characteristics of gas-liquid reactors are the

a.

specific inter-facial area

b.

liquid hold-up

c.

both (a) and (b)

d.

none of these

Discuss
Answer: (c).both (a) and (b)
Q235.
Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction ?

a.

Ash resistance.

b.

Gas film and pore surface diffusion resistances for reactants.

c.

Surface phenomenon resistance.

d.

Gas film and pore surface diffusion resistances for products.

Discuss
Answer: (a).Ash resistance.
Q236.
If the time required to change the concentration of reactant to half its original value is independent of the initial concentration, the order of reaction is

a.

zero

b.

one

c.

two

d.

three

Discuss
Answer: (b).one
Q237.
A batch adiabatic reactor at an initial temperature of 373°K is being used for the reaction, A β†’ B. Assume the heat of reaction is - 1 kJ/mole at 373°K and heat capacity of both A and B to be constant and equal to 50 J/mole.K. The temperature rise after a conversion of 0.5 will be

a.

5°C

b.

10°C

c.

20°C

d.

100°C

Discuss
Answer: (b).10°C
Q238.
A photochemical reaction is

a.

accompanied with emission of light.

b.

catalysed by light.

c.

initiated by light.

d.

all (a), (b) & (c).

Discuss
Answer: (c).initiated by light.
Q239.
Photochemical reaction rate does not depend significantly on temperature, because

a.

it is a reversible reaction.

b.

it is an exothermic reaction.

c.

the energy of reacting molecules exceeds the activation energy by absorption of light.

d.

none of these.

Discuss
Answer: (c).the energy of reacting molecules exceeds the activation energy by absorption of light.
Q240.
A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A β†’ R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given:

Cα΄€β‚€ = 5 kmole/m³ ; Xα΄€ = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min⁻¹ ; (Ξ”H) = - 40kJ/mole; ρ = 1000kg/m³ ,CP = 4 J/gm.°C ; q = 10⁻³ m³/min (ρ and CP are same for the reactant and product streams).

The amount of heat to be removed is

a.

2/3 kW

b.

1kW

c.

5/3 kW

d.

4kW

Discuss
Answer: (c).5/3 kW
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