Platinum gauze catalyzes the oxidation of ammonia to nitric oxide. This an example of

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Platinum gauze catalyzes the oxidation of ammonia to nitric oxide. This an example of Answer: Heterotropic catalysis

In the oxidation of ammonia to nitric oxide, platinum gauze acts as a solid catalyst, while the reactants (NH₃ and O₂) are gases. Since the catalyst and reactants are in different phases, this is an example of heterogeneous catalysis.