Alkynes are hydrocarbons with carbon-carbon triple bonds in them. The simplest alkyne can be prepared by the process shown in Reaction 1.
Also consider the following reactions.
Quinoline is a heterocyclic amine.
Reaction 3 is best described as:
|A||A substitution reaction.|
|B||An addition reaction.|
|C||An elimination reaction.|
|D||A dehydrogenation reaction.|
Alkynes, just like alkenes, can undergo addition reactions. Reaction 2 is a typical example of an addition reaction.