Question

What are the characteristics of Homologous series ?

What is meant by homologous series?

Give some examples of it

Need detail answer​

Answer 1

Homologous series is defined as a systematic order of organic compounds having same functional group that can be represented by same general formula and prepared by same method. The difference between two consecutive members in their composition is –CH2unit.

Each member of a homologous series is known as homologue and this phenomenon is called homology.

Example:

· Alkane

CnH2n+2

n=1

CH4

n=2

CH3-CH3

· Alcohol

CnH2n+1OH

n=1

CH3-OH

n=2

CH3-CH2-OH

· Aldehyde

HCHO

n=1

CH3-C-O-H

Characteristics of homologous series:

1. The members of a series have same functional group.

2. Two consecutive members of a homologous series differs each other in their composition by –CH2unit.

Example:

Alcohol (-OH)

CH3-OH , CH3-CH2-OH , CH3-CH2-CH2-OH

3. The members of a homologous series can be represented by same general formula.

Example:

Alcohol è CnH2n+1OH

Aldehyde è CnH2n+1CHO

Carboxylic acid è CnH2n+1COOH

4. The members of a particular homologous series have almost same chemical properties due to presence of same functional group.

5. 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.

6. The members of a homologous series can be prepared by same or common general method of preparation.

7. The first member of homologous series generally shows certain different chemical behavior than other members of the serie

Answer 2

Ello ❤❤

Your answer is here ↪↪↪↪↪↪

Homologous series-

If organic compounds having similar chemical properties are arranged in the increasing order of their molecular weight then the series obtained is known as homologous series.

↪↪Characteristics of Homologous series-

1) All the members of homologous series are represented by the same general formula.

2) All the members of homologous series can be prepared by the same general method of preparation.

3) There is a regular change in their physical properties like melting point, boiling point, density, etc, on descending down a homologous series.

4) All the members of homologous series show similar chemicals properties because they contain same functional group.

Ex, CH3-OH