. What is meant by homologous series? State any four characteristics.
The member of the same class of organic compounds such as alkanes when arranged in ascending order of their molecular mass differ from each other by (-CH2) group are called homologous and series is known as homologous series.
The characteristics of homologous series are :
a. The members of a homologous series are represented by the same general formula.
b. The members of homologous series differ by (-CH2) group.
c. The members of same homologous series show similar chemical properties.
d. The members of same homologous series show different physical properties.