Chemical Reaction Engineering
For the same residence time, which one will give the maximum conversion?

Stirred tank followed by tubular flow reactor (each of 2.5 litres)
Single stirred tank (v = 5 litres)
Single tubular flow reactor (v = 5 litres)
Two stirred tank (each of 2.5 litres) in series

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Chemical Reaction Engineering
"A spherical porous catalyst particle of radius R is subjected to reactant A which reacts to form B by a zero order surface reaction A → B. Film mass transfer resistance is negligible and pore diffusion of A is rate controlling. The effectiveness factor of the catalyst is reported as 7/8. Which of the following statement is true?A. Inner catalyst core of radius R/8 does not participate in reaction."

Ffectiveness factor for a zero order reaction can not be 7/8 as it must always be 1
Inner catalyst core of radius 7R/8 does not participate in reaction
Inner catalyst core of radius R/8 does not participate in reaction
Inner catalyst core of radius R/2 does not participate in reaction

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