1. Combustion – it burns in oxygen to produce water and carbon (iv) oxide
C2H4(g) + 3O2(g)Β βΒ 2H2O(L)
2. Addition reaction βit undergoes addition reactions with some atoms like hydrogen, chlorine etc to form a saturated compound.
C2H4(g) + H2(g) βΒ C2H6(g)
3. Polymerization β It is the combination of two or more small molecules (monomers) to form a larger molecule (polymers).