Chemical Reaction Engineering MCQ Questions & Answers

31

A plug-flow reactor is characterised by

A) High capacity B) Presence of axial mixing C) Presence of lateral mixing D) Constant composition and temperature of reaction mixture

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Answer & Solution

Answer: Option C

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32

Pick out the correct statement

A) Reactions with high activation energies are very temperature sensitive B) Chemical equilibrium is a static state C) A photochemical reaction is catalysed by light D) A chemical reaction occurs when the energy of the reacting molecule is less than the activation energy of the reaction

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Answer & Solution

Answer: Option A

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33

On application of pressure to the equilibrium system, ice ⇋ water; which of the following phenomenon will occur?

A) Water will evaporate B) Equilibrium will not be attained C) More ice will be formed D) More water will be formed

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Answer & Solution

Answer: Option D

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34

The excess energy of the reactants required to dissociate into products is known as the __________ energy.

A) Thermal B) Activation C) Threshold D) Binding

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Answer & Solution

Answer: Option B

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35

Radioactive decay follows __________ order kinetics.

A) First B) Second C) Third D) Zero

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Answer & Solution

Answer: Option A

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36

__________ 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

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Answer & Solution

Answer: Option B

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37

The conversion in a mixed reactor/accomplishing a reaction A 3R is 50% when gaseous reactant 'A' is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is __________ second.

A) 0.5 B) 1 C) 2 D) 3

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Answer & Solution

Answer: Option A

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38

Pick out the wrong statement.

A) Use of different catalysts in a reversible catalytic chemical reaction does not change the equilibrium composition B) Alumina is added as a promoter to iron catalyst in ammonia synthesis reaction C) Activation energy for a reaction is obtained from the intercept of the Ar-rhenious plot D) Presence of inerts affects the equilibrium conversion of reactants in a chemical reaction

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Answer: Option C

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39

Pick out the wrong statement.

A) A catalyst does not alter the final position of equilibrium in a reversible reaction B) A catalyst initiates a reaction C) A catalyst is specific in reaction D) A catalyst remains unchanged in chemical composition at the end the reaction

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Answer & Solution

Answer: Option B

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40

Pick out the wrong statement.

A) A particular chemical reaction is more temperature sensitive at low temperatures B) A very high value of equilibrium constant, K (K >> 1) indicates that the reaction is practically irreversible in nature C) The intercept of the Arrhenious plot is called the 'activation energy' D) Non-ideal flow takes place in reactors due to recycling, channeling or by creation of stagnant regions

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Answer & Solution

Answer: Option C

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Chemical Reaction Engineering MCQ Questions & Answers | Chemical Engineering