Write four properties of homologous series.

1.	Write four properties of homologous series.
Answer» Have same general formula,2 any to home logos difference by Ch 2 group and difference is 4 molecule molecular mass is 14 U, 3 have same chemical property,4 but show some gradual changes in physical properties 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-OH3. The members of a homologous series can be represented by same general formula.Example: Alcohol è CnH2n+1OHAldehyde è CnH2n+1CHOCarboxylic acid è CnH2n+1COOH4. 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 series.

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