Chemical Reaction Engineering
In solid catalysed reactions the diffusional effects are more likely to affect the overall rate of reaction for

Slow reactions in catalyst of large pore diameter
Slow reactions in catalyst of small pore diameter
Fast reactions in catalyst of small pore diameter
Fast reaction in catalyst of large pore diameter

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Chemical Reaction Engineering
For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a

Tubular reactor is preferred over a single CSTR for high yield
Batch reactor is preferred over a single CSTR for high yield
Single CSTR is the most suitable
Both A and B

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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
High recycle for pure gas
All of these
Plug flow for dilute liquid requiring no large preheating of feed

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