Question

Define homologous series ? what are the characters of a homologous series?

Answer 1

The members of a series have same functional group. The physical properties(like solubility, melting point, boiling point, state) of members of a homologous series either gradually increase or decrease with increase in molecular mass.

Answer 2

__________Answer_________

HOMOLOGOUS SERIES :-

➡A series of organic compounds in which the same functional group substitute for hydrogen in a carbon Chain is called homologous series.

CHARACTERISTICS OF HOMOLOGOUS SERIES :-

• All the members of homologous series have same functional group.

• All the members of homologous series have same general formula.

• The change in properties of homologous series is because of Change in size of a alkyle group.

• Each successive member in homologous series differ by molecular formula ( CH2).
• Any two successive member differ by molecular mass 14u.

• Physical properties like melting point, boiling point, solubility in particular solvent also show gradation in homologous series . These are determine by Carbon Chain end.

• Chemical properties are determine by functional group.

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