Question

In Ostwald’s process, oxidation of gaseous ammonia into nitric acid takes place in the presence of solid platinum gauze, which acts as the catalyst for this reaction. This is an example of:

• A. Homogeneous catalysis
• B. Heterogeneous catalysis
• C. Both a and b
• D. Cannot be determined

Answer 1

The correct option is B Heterogeneous catalysis

Here the reactant is in gaseous phase while the catalyst is in solid phase. Since the two are in different phases, so this is an example of heterogeneous catalysis.