Question

What are homologous series of carbon compounds ? Write the molecular formula of two consecutive members of homologous series of aldehydes. State which part of these compounds determines their (i) physical and (ii) chemical properties.

Answer 1

homologous series is the series of organic compound where successive members follow a particular pattern, successive members differ by CH2 group.
two members are-
HCHO
CH3CHO
the physical properties depend on the length of the carbon chain
chemical properties depend on the functional group.

Answer 2

homologous series is the series of organic compound where successive members follow a particular pattern, successive members differ by CH2 group.

two members are-

HCHO

CH3CHO

the physical properties depend on the length of the carbon chain

chemical properties depend on the functional group.