Chemical Reaction Engineering MCQ Questions & Answers

1

Enzymes are destroyed, when the

A) Temperature is very high B) Reactant's concentration is very high C) Reactant's concentration is very low D) Reaction rate is independent of the reactant's concentration

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Answer & Solution

Answer: Option A

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2

A catalyst is said to be a negative catalyst, ifit

A) Retards the rate of reaction B) Reduces the value of equilibrium constant C) Does not initiate the reaction D) All of the above

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Answer & Solution

Answer: Option A

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3

For a zero order chemical reaction, the

A) Half life period is directly proportion to the initial concentration of the reac-tants B) Plot of products concentration with time is a straight line through the origin C) Products concentration increases linerarly with time D) All of the above

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Answer & Solution

Answer: Option D

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4

The equilibrium constant of a catalytic chemical reaction __________ due to the presence of a catalyst.

A) Increases B) Decreases C) Remains unaffected D) Unpredictable from the data

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Answer & Solution

Answer: Option C

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5

From Arhenius law, a plot of log_e K versus $$\frac{1}{{\text{T}}}$$ gives a straight line with a slope of $$\left( { - \frac{{\text{E}}}{{\text{R}}}} \right)$$ . The unit of $$\frac{{\text{E}}}{{\text{R}}}$$ is

A) K cal B) K cal/°K C) °K D) K cal. °K

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Answer & Solution

Answer: Option C

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6

Which of the following factors control the deactivation of a porous catalyst pellet?

A) Decay reactions B) Pore diffusion C) Form of surface attack by poison D) All of the above

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Answer & Solution

Answer: Option D

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7

Velocity of a reaction depends upon the

A) Nature of the reactants B) Concentration of the reactants C) Temperature at which the reaction is carried D) All of the above

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Answer & Solution

Answer: Option D

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8

Inversion of cane sugar is an example of

A) Unimolecular reaction with first order B) Bimolecular reaction with second order C) Bimolecular reaction with first order D) Unimolecular reaction with second order

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Answer & Solution

Answer: Option C

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9

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

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Answer & Solution

Answer: Option C

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10

The enzyme which can catalyse the conversion of glucose to ethyl alcohol is

A) Invertase B) Maltase C) Diastase D) Zymase

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Answer & Solution

Answer: Option D

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Chemical Reaction Engineering MCQ Questions & Answers | Chemical Engineering