Chemical Reaction Engineering MCQ Questions & Answers

1

In case of a __________ reactor, the composition in the reactor and at the exit of the reactor is the same.

A) Semi-batch B) Tubular C) Batch D) Back-mix

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Answer & Solution

Answer: Option D

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2

For reactions in parallel viz A → P (desired product) and A → 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

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Answer & Solution

Answer: Option C

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3

Maximum equilibrium conversion for endothermic reaction is obtained at the __________ temperature.

A) Highest possible B) Lowest possible C) Intermediate D) Room

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Answer & Solution

Answer: Option A

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4

The gas phase reaction 2A ⇋ B is carried out in an isothermal plug flow reactor. The feed consists of 80 mole % A and 20 mole % inerts. If the conversion of A at the reactor exit is 50%, then $$\frac{{{{\text{C}}_{\text{A}}}}}{{{{\text{C}}_{{{\text{A}}_{\text{0}}}}}}}$$ at the outlet of the reactor is

A) $$\frac{2}{3}$$ B) $$\frac{5}{8}$$ C) $$\frac{1}{3}$$ D) $$\frac{3}{8}$$

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Answer & Solution

Answer: Option B

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5

The molecularity and the order of reaction respectively, for the hydrolysis of methyl acetate in presence of acids are

A) 2 & 1 B) 11 & 2 C) 2 & 2 D) 1 & 1

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Answer & Solution

Answer: Option A

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6

From collison theory, the reaction rate constant is proportional to

A) Exp(- E/RT) B) Exp(- E/2RT) C) √T D) T^m.exp(- E/RT)

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Answer & Solution

Answer: Option D

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7

For any reaction, we may write conversion as a function of

A) Time B) Temperature C) Concentration D) All of the above

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Answer & Solution

Answer: Option D

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8

In flow reactors, the performance equations interrelate the rate of reaction to the

A) Feed rate B) Reactor volume C) Extent of reaction D) All of the above

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Answer & Solution

Answer: Option D

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9

The space time is equivalent to the holding time in a steady state mixed reactor for

A) Non-isothermal gas reaction B) Variable fluid density systems C) Constant fluid density systems D) Gas reactions with changing no. of moles

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Answer & Solution

Answer: Option C

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10

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

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Answer & Solution

Answer: Option A

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Chemical Reaction Engineering MCQ Questions & Answers | Chemical Engineering