Chemical Reaction Engineering
The exit age distribution of fluid leaving a vessel is used to know the

Activation energies of a reaction
Extent of non-ideal flow in the vessel
Reaction mechanism
None of these

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Chemical Reaction Engineering
In case of staged packed bed reactors carrying out exothermic reaction, use

High recycle for pure gas
Plug flow for dilute liquid requiring no large preheating of feed
All of these
Cold shot operations for a dilute solution requiring large preheating to bring the stream upto the reaction temperature

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