Give four examples of heterogeneous catalysis.
Oxidation of sulphur dioxide into sulphur trioxide in the presence of
2) Formation of ammonia from Haber process.
3) Oxidation of ammonia into nitric acid in presence of platinum gauze in Ostwald's process
→ 4NH3(g)+ 5O2(g) Pt(s) 4NO +6H2O
4) Hydrogenation of vegetable oils in presence of Nickel as catalyst
Vegetable oil(l)+H2(g) Ni → Vegetable ghee (s)
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