What is homologous series of organic Compounds ? State any two characteristics of a homologous series .

Question

(i) What is homologous series of organic Compounds? State any two characteristics of a homologous series.
(ii) Draw the electron dot structure for Propanal.

Answer 1

(i) A series of compounds in which the same functional group substitutes for hydrogen in a carbon chain is called homologous series.
Characteristics of homologous series:
(a) The molecular formulae of any two successive members of a homologous series differ by -CH₂.
(b) There is a regular gradation in physical properties of members of a homologous series.