Question : Define homologous series of organic compounds. List its twocharacteristics. Write the name and formula of the first member of the series of alkenes.

Question : Define homologous series of organic compounds. List its two

1.	Question : Define homologous series of organic compounds. List its twocharacteristics. Write the name and formula of the first member of the series of alkenes.
Answer» Solution :The series of organic compounds having same functional group and similar CHEMICAL properties is called homologous series. Each MEMBER differs from successive memberby - `CH_(2) `- group. The DIFFERENCE in molecular weigth between two successive members is 14 u. Characteristics. : It has same GENERAL formula, from which all members can be derived. (ii)They have similar chemical properties. `C_(2)H_(4), CH_(2) = CH_(2)` , Ethene is first memberof alkene series.