Write the molecular formula of the 2nd and 3rd member of the homologous series whose first member is methane.
The organic compounds constituting only Carbon () and Hydrogen () atoms are called hydrocarbons.
The organic compounds containing carbon atoms have a single bond between two carbon atoms are called saturated hydrocarbons.
Example: Methane ()
A homologous series is a collection of molecules with the same chemical characteristics and similar functional groups that differ by group from one another
The difference between and is unit, whereas Ethane () and propane () is also differed by unit. As a result, both are homologous.
Therefore, the molecular formula of the 2nd and 3rd members of the homologous series is Ethane and Propane .