Define homologous series of organic compounds. List its two characteristics. Write the name and formula of the first member of the series of alkenes.
Answers
ANSWER :
▶️The series of organic compounds having same functional group and similar chemical properties is called homologous series.
▶️Each member differs from successive
member by —CH2— group. The difference in molecular weight between two successive members is 14u.
▶️Characteristics:
(i) It has same general formula, from which, all members can be derived.
(ii) They have similar chemical properties. C2H4, CH2=CH2, Ethene is first member of alkene series.
Answer:
Explanation:
The series which consists of similar structures and similar chemical properties in which the successive compounds differs by a CH2 group is termed as homologous series. The two characteristics of homologous series are as follows:
1. The members of the homologous series consists of same general formula such as Alkanes have general formula CnH2n+2
2. The two adjacent homologues have a difference of molecular mass of 14 u
(i) All the members of a homologous series can be represented by the same-general formula.
(ii) The difference in the molecular mass of any two adjacent homologues is 14 u.
The general formula for the alkenes is: CnH2n
The first member of the series of alkenes is: Ethane which has formula CH4
HoPe hELpS yu^-^!