. Define homologous series of organic compounds list its two characteristics. Write the name and formula of the first member of the series of alkenes


Best Answer

Ans. A homologous series is a group of organic compounds having  similar  structures  and similar chemical properties in which  the successive compounds  differ by CH2 group.

Characteristics of homologous series:

• (i) All the members of a homologous series can be represented by the same-general formula. (ii) The difference in the molecular mass of any two adjacent homologues is 14 u.

Name and formula of the first member of the series of alkenes:

General formula - CnH2n

1st member   CH4 ethene

2nd member  C3H6    propene

 

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