Question

what is homologous series ? what are the characteristics of homologous series​

Answer 1

Answer:

Four characteristics of a homologous series are: (i) The general formula of all compounds in the series is the same. (ii) They have the same functional group. (iii) Their physical properties such as melting point, boiling point, density, generally show a gradual change with increase of molecular formula in the series.

Explanation:

Answer 2

Answer:

A homologous series is a group of organic compunds having similar structures and similar chemical properties in which the successive compunds differ $\bf CH_2$ group.

Characteristics:

★ All the members of a homologous series can be represented by the same gener formula. For example, all the members of the alkane series can be represented by the general formula $\rm C_n H_{2n+2}$.

★ Any two adjacent homologues differ by 1 carbon atom and 2 hydrogen atoms in their molecular formulae.

★ The difference in the molecular masses lf any two adjacent homologues is 14 u.

★ All the compounds of a homologous series show similar chemical properties. for example, all the compounds of alkane series like methane, ethane, propane, etc., undergo substitution reactions with chlorine.

★ the members of a homologous series show a gradual change in their physical properties with increase in molar mass.