Chemical Reaction Engineering
For a first order isothermal chemical reaction in a porous catalyst, the effectiveness factor is 0.3. The effectiveness factor will increase if the

Catalyst size is reduced or the catalyst diffusivity is reduced
Catalyst size is reduced or the catalyst diffusivity is increased
Catalyst size is increased or the catalyst diffusivity is increased
Catalyst size is increased or the catalyst diffusivity is reduced

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Chemical Reaction Engineering
Pick the WRONG design guideline for a reactor in which the reactions, A → R (desired) and A → S (undesired) are to take place. The ratio of the reaction rates is rR/rS = (k₁/k₂).Csub>Aa-b

Avoid recycle, when a > b
Use CSTR with a high conversion, when a > b
Use batch reactor or plug flow reactor, when a > b
Use high pressure and eliminate inerts, when a > b

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