Chemical Reaction Engineering
Effectiveness factor (E) of a catalyst pellet is defined as, E = (actual rate within pore of catalyst/rate if notsnowed by pore diffusion) Effectiveness factor for a first order reaction is given by (where, T = Thiele modulus)

None of these
Tan hT/T
Tan T/T
Tan hT/tan T

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Chemical Reaction Engineering
For a heterogeneous catalytic reaction

The surface of the catalyst does not play an important role during reaction
Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction
The catalyst does not form an intermediate complex with the reactant
A relatively small amount of catalyst can cause the conversion of large amount of reactants which does not mean that catalyst concentration is important

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