CBSE Class 10 Answered
What is the significance of homologous series?
Asked by सुधाकर | 03 Mar, 2017, 05:57: PM
Expert Answer
It is a group of organic compounds having a similar structure and similar chemical properties in which the successive compounds differ by a -CH2 group.
Characteristics of a Homologous series
- Each member of the series differs from the preceding one by the addition of a -CH2 group and by 14 a.m.u.
- All members of a homologous series share the general formula.
For example, the general formula for alkane is CnH2n+2 and alkene is CnH2n.
- The physical properties of the members show a gradation in properties as the molecular mass increases.
- The chemical properties also show a gradient similarity.
For example: Methane and ethane react with chlorine to form methyl chloride and ethyl chloride respectively.
CH4 + Cl2 → CH3Cl
C2H6 + Cl2 → C2H5Cl
Answered by | 03 Mar, 2017, 06:01: PM
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