Provide the primary information about alkynes.

(N/A) Alkynes are unsaturated hydrocarbons.
They contain at least $1$ triple bond between two carbon atoms $(C \equiv C)$.
The general formula for alkynes is $C_{n}H_{2n-2}$.
The first member of the alkyne series is ethyne,which is popularly known as acetylene.
Acetylene is used for arc welding in the form of an oxyacetylene flame,obtained by mixing acetylene with oxygen gas.
Alkynes serve as starting materials for the synthesis of a large number of organic compounds.