Chemical Reaction Engineering Quiz | Chemical Reaction Engineering Multiple Choice Questions(MCQs) with Answers

Questions
61 Stimulus-response techniques are commonly used to characterize the extent of non-ideal flow in vessels. Tracer input signal is used as stimulus. Any material can be used
A as tracer if it can disturb the flow pattern in the vessel
B as tracer if it does not disturb the flow pattern in the vessel and it can be detected.
C as tracer if it follows iedeal flow patterns
D as tracer.

Answer: as tracer if it follows iedeal flow patterns
62 The exit age distribution of fluid leaving a vessel is used
A to study the reaction mechanism
B to study the extent of non-ideal flow in the vessel
C to know the reaction rate constants
D to know the activation energies of a reaction.

Answer: to study the extent of non-ideal flow in the vessel
63 Which of the following are example of autocatalytic reaction?
A Enzyme fermentation reactions
B Microbial fermentation reactions
C Photochemical reactions
D Synthesis of ammonia.

Answer: Photochemical reaction
64 A first-order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is
A minimum when the reactors are of defferent sizes
B maximum when the reactors are equal in size
C minimum when the reactors are equal in size.
D None

Answer: maximum when the reactors are equal in size
65 For identical feed composition, flow rate, conversion and for zero-order reactions the ration of the volume of mixed reactor to the vomume of plug flow reactor is
A 0
B 1
C < 1
D > 1

Answer: 1
66 For identical feed composition, flow rate, conversion and for all positive reaction orders the ratio of the volume of mixed reactor to the the volume of plug flow reactor
A is independent of the order of reaction
B increases with increase in the order of reaction
C decreases with increase in the order of reaction
D increases linearly with increase in the order of reaction.

Answer: increases linearly with increase in the order of reaction.
67 In an ideal mixed reactor at steady-state
A the composition throughout the reactor remains same
B the exit stream has the same composition as the fluid within the reactor
C the space-time is equivalent to holding time for constant density systems
D all of these answers.

Answer: all of these answers.
68 In an ideal plug flow reator at steady state
A there may be diffusion along the flow path
B there must be lateral mixing of fluid
C the composition of the reactant remains constant along a flow path
D the fractional conversion of the reactant varies from point to point along a flow path

Answer: there may be diffusion along the flow path
69 For a steady-state mixed reactor the space-time is equivalent to the holding time for
A constant fluid density systems
B variable fluid density systems
C non-isothermal gas reactions
D gas reactions with changing number of moles.

Answer: variable fluid density systems
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