Answer:
The mechanism of heterogeneous
catalysis involves five steps :
(i) Diffusion of
reactant to the surface of catalyst.
(ii) Adsorption
of reactant molecules on the surface of the catalyst.
(iii)
Occurrence of chemical reaction on the catalyst surface through formation of an
intermediate.
(iv) Desorption
of products from the catalyst surface and thereby the surface available again
for more reaction to occur.
(v) Diffusion
of reaction products away from catalyst's surface.
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