(i) Contact process: Industrial method to prepare H2SO4 in presence of V2O5.
(ii) Wacker oxidation: Conversion of ethylene to acetaldehyde by an acidic, aqueous solution of PdCl2 .
(iii) Ziegler-Natta catalyst is used to polymerize terminal alkenes (ethylene and alkenes with the vinyl double bond).
n(CH2=CHR)→[CH2−CH2R]n
(iv) Haber process: Haber process is used to form NH3 in presence of Iron oxide.