Alkyne is more reactive than alkanes. The existence of a triple bond which is owned alkyne allow the addition reactions, polymerization, substitution and combustion.
Uses of Alkyne:
Acetylene, the simplest alkyne, is used in torches to generate temperatures of around 3,000 degrees Celsius to weld metal by generating oxy-acetylene welding.
It is also used as a starting material in the synthesis processes used to make polymers, and as a solvent.
Alkynes are generally used as the starting materials for the manufacture of a large number of organic compounds of industrial importance such as, chloroprene, vinyl chloride etc.
Alkynes are also highly important parts of some antitumor agents.