Chemical Reaction Engineering
For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is

Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase
Surface reaction between A in the gas phase and absorbed B
Desorption of C
Surface reaction between absorbed A and absorbed B

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Chemical Reaction Engineering
For a zero order chemical reaction, the

All of these
Half life period is directly proportion to the initial concentration of the reac-tants
Plot of products concentration with time is a straight line through the origin
Products concentration increases linerarly with time

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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
The catalyst does not form an intermediate complex with the reactant
Free energy of activation is lowered in the presence of catalyst, which remains unchanged at the end of reaction
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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