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(C) According to the adsorption theory of heterogeneous catalysis,the mechanism involves the following steps: $1$. Diffusion of reactants to the surfa

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The product molecules remain permanently bound to the catalyst surface.

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(C) According to the adsorption theory of heterogeneous catalysis,the mechanism involves the following steps: $1$. Diffusion of reactants to the surface of the catalyst. $2$. Adsorption of reactant molecules on the surface of the catalyst. $3$. Occurrence of a chemical reaction on the catalyst surface through the formation of an intermediate. $4$. Desorption of product molecules from the surface,thereby making the surface available again for more reaction. $5$. Diffusion of reaction products away from the surface. Since the product molecules must desorb to free the surface for further reaction,the statement that product molecules remain permanently bound to the catalyst surface is incorrect.

Column-$I$	Column-$II$
$A$. Haber's process for ammonia	$P$. Zeolite
$B$. Oswald's process for $HNO_3$	$Q$. $Fe$
$C$. Contact process for $H_2SO_4$	$R$. $V_2O_5$
$D$. Cracking of hydrocarbons	$S$. $Pt$ gauge

Which of the following statements regarding adsorption theory of heterogeneous catalysis is not correct?

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