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

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Chemical Reaction Engineering
In Langmuir treatment of adsorption,

Extent of adsorption is more than one complete monomolecular layer on the surface
Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site
Whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule
All the adsorption does not take place by the same mechanism

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