Question

Plzzz answer
What is 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

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Homologous series

Homologous series are a series of carbon compound with regularly varying

chain lengths and the same functional group. Adjacent compound differs by

CH2 unit and H4 molecule mass.

CH3- CHO, CH3CH2-CHO are two consecutive member, of homologous series

of aldehydes.

I. The carbon Chain length determines physical properties.

II. The functional group determines chemical properties.

                                                                                                                                       

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Answer 2

Homologous series may be series as series of organic compound having similar structure and similar chemical properties in which succeive member differ in molecular formula by -CH2 group . the different members in the series are called Homologus.

Aldehydes commonly represented as -CHO.
using the formula formaldehyde is HCHO and that of aceldehyde is CH3CHO.

The chemical properties of these compounds are similar because of similar functional group but have different physical properties . They show difference in boiling and melting point of homologous compound.