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

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Chemical Reaction Engineering
A Catalyst

Shortens the time to reach the equilibrium
Changes the equilibrium constant of the reaction
None of these
Increases the equilibrium concentration of the product

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