(i) Oxidation of sulphur dioxide to form sulphur trioxide. In this reaction, Pt acts as a catalyst
.
(ii) Formation of ammonia by the combination of dinitrogen and dihydrogen in the presence of finely divided iron.
This process is called the Haber’s process.
(iii) Oswald’s process: Oxidation of ammonia to nitric oxide in the presence of platinum.
(iv) Hydrogenation of vegetable oils in the presence of Ni.
