Chemical Reaction Engineering
Considering the endotheomic dissociation of CaCO₃ in a closed vessel (CaCO₃ ⇋ CaO + CO₂), the pressure of CO₂ increases, if

None of these
A catalyst is added
The temperature is increased
An inert gas is pumped keeping the temperature constant

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

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

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