Cannot Undergo Addition Polymerisation

Ethane cannot undergo addition polymerisation because it is a saturated hydrocarbon with no double bond. Addition polymerisation typically involves the breaking of a double bond in an unsaturated monomer and the formation of single bonds between monomers. Since ethane does not have a double bond, it cannot undergo addition polymerisation.

Explanation

Addition polymerisation is a type of polymerisation reaction that involves the joining of monomer molecules to form a polymer chain. This reaction occurs when unsaturated monomers, such as ethylene, propylene or vinyl benzene, undergo polymerisation. The reaction involves the breaking of double bonds in the monomer and the formation of single bonds between monomers to form a long chain polymer.

Ethane, on the other hand, is a saturated hydrocarbon with the chemical formula C2H6. It does not have any double bonds and, therefore, cannot undergo addition polymerisation. In contrast, ethylene (C2H4) has a double bond and can undergo addition polymerisation to form polyethylene, a common plastic material.

In conclusion, ethane cannot undergo addition polymerisation because it is a saturated hydrocarbon with no double bond. This reaction requires unsaturated monomers, such as ethylene, propylene or vinyl benzene, to undergo polymerisation.