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 12 of 50

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Q111.
__________ is the response curve for a step input signal from a reactor.

a.

S-curve

b.

C-curve

c.

I-curve

d.

none of these

Discuss
Answer: (a).S-curve
Q112.
'If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the

a.

pressure

b.

temperature

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).temperature
Q113.
For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.

a.

fixed

b.

fluidised bed reactor followed by a fixed

c.

fixed bed reactor followed by a fluidised

d.

fluidised

Discuss
Answer: (b).fluidised bed reactor followed by a fixed
Q114.
For every 10°C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70°C, the rate of reaction increases __________ times.

a.

8

b.

12

c.

16

d.

32

Discuss
Answer: (c).16
Q115.
The single parameter model proposed for describing non-ideal flow is the __________ model.

a.

tank in series

b.

dispersion

c.

both (a) & (b)

d.

neither (a) nor (b).

Discuss
Answer: (c).both (a) & (b)
Q116.
A first order reaction requires two equal sized CSTR. The conversion is

a.

less when they are connected in series.

b.

more when they are connected in series.

c.

more when they are connected in parallel.

d.

same whether they are connected in series or in parallel.

Discuss
Answer: (b).more when they are connected in series.
Q117.
Rate constant for a first order reaction does not depend upon reaction time, extent of reaction and the initial concentration of reactants ; but it is a function of reaction temperature. In a chemical reaction, the time required to reduce the concentration of reactant from 100 gm moles/litre to 50 gm moles/litre is same as that required to reduce it from 2 gm moles/litre to 1 gm mole/litre in the same volume. Then the order of this reaction is

a.

0

b.

1

c.

2

d.

3

Discuss
Answer: (b).1
Q118.
Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature ?

a.

Time

b.

Useful volume of the tank

c.

Diameter of the reactor

d.

None of these

Discuss
Answer: (a).Time
Q119.
For reactions in parallel viz A โ†’ P (desired product) and A โ†’ Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a

a.

batch reactor is preferred over a single CSTR for high yield.

b.

tubular reactor is preferred over a single CSTR for high yield.

c.

both (a) and (b).

d.

single CSTR is the most suitable.

Discuss
Answer: (c).both (a) and (b).
Q120.
For a gaseous phase reaction, rate of reaction is equal to K. Cแด€ . Cส™. If the volume of the reactor is suddenly reduced to 1/4th of its initial volume, then the rate of reaction compared to the original rate will be __________ times.

a.

8

b.

16

c.

1/8

d.

1/16

Discuss
Answer: (b).16
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