Chemical Reaction Engineering - Section 1 (3)

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Chemical Reaction Engineering - Section 1

The MCQs related to Chemical Reaction Engineering
are available in this section and you can solve the problems to test your skills.

17.

Specific rate constant for a second order reaction

A.	is independent of temperature.
B.	varies with temperature.
C.	depends on the nature of the reactants.
D.	both (b) and (c).

Answer: Option D

Explanation:

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18.

'N' plug flow reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for __________ order reactions.

A.	first
B.	second
C.	third
D.	any

Answer: Option D

Explanation:

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19.

A catalyst loses its activity due to

A.	loss in surface area of the active component.
B.	agglomeration of metal particles caused by thermal sintering of the solid surface.
C.	covering of the catalytic active sites by a foregin substance.
D.	all (a), (b) and (c).

Answer: Option D

Explanation:

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20.

The increase in the rate of reaction with temperature is due to

A.	increase in the number of effective collisions.
B.	decrease in activation energy.
C.	increase in the average kinetic energy of the reacting molecules.
D.	none of these.

Answer: Option B

Explanation:

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21.

For a heterogeneous catalytic reaction

A.	free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction.
B.	a relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important.
C.	the catalyst does not form an intermediate complex with the reactant.
D.	the surface of the catalyst does not play an important role during reaction.

Answer: Option A

Explanation:

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22.

A batch reactor is suitable for

A.	achieving cent percent conversion of reactants into products.
B.	large scale gaseous phase reactions.
C.	liquid phase reactions.
D.	obtaining uniform polymerisation products in highly exothermic reactions.

Answer: Option C

Explanation:

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23.

The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is

A.	8987°K
B.	9210°K
C.	8764°K
D.	8621°K

Answer: Option B

Explanation:

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24.

A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length

A.	decreases.
B.	increases.
C.	is at the highest allowable temperature throughout.
D.	first increases and then decreases.

Answer: Option C

Explanation:

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