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The rate of the heterogeneous catalytic reaction A(g) + B(g) → C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction is_______________?

 (A)  Absorption of A

 (B)  Surface reaction between absorbed A and absorbed B

 (C)  Surface reaction between absorbed A and B in the gas phase

 (D)  Surface reaction between A in the gas phase and absorbed B

Submitted By :Ali Uppal

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