Why are certain compound called hydrocarbons write the general formula for homologous series of alkanes alkenes and alkynes and also draw the structure of the first member of Each series

Why are certain compound called hydrocarbons write the general formula

1.	Why are certain compound called hydrocarbons write the general formula for homologous series of alkanes alkenes and alkynes and also draw the structure of the first member of Each series
Answer» Hello mate Alkanes have only single bonds,alkenes contain a carbon-carbon double BOND, and alkynes contain a carbon-carbon triple bond. Aromatichydrocarbons make up a group of related SUBSTANCES obtained by chemical BREAKDOWN of certainpleasant-smelling PLANT extracts.